<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019e025f-4439-7c3f-befa-73bdcf88bdc0,g:bab8bf69-8c90-4841-bd5d-6b462489e974-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.workiva.com/role/CoverPage" xlink:type="simple" xlink:href="wk-20260630.xsd#CoverPage"/>
  <link:definitionLink xlink:role="http://www.workiva.com/role/CoverPage" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInformationLineItems_019e025f-44ec-73ad-8a33-d7f334f58639" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitiesTable_019e025f-44ec-74b0-a9a4-bb051b07c5d2" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntitiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_EntityInformationLineItems_019e025f-44ec-73ad-8a33-d7f334f58639" xlink:to="loc_dei_EntitiesTable_019e025f-44ec-74b0-a9a4-bb051b07c5d2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019e025f-44ec-70f5-a7ec-19fa16ee6e7e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_EntitiesTable_019e025f-44ec-74b0-a9a4-bb051b07c5d2" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019e025f-44ec-70f5-a7ec-19fa16ee6e7e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e025f-44ec-70f5-a7ec-19fa16ee6e7e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e025f-44ec-70f5-a7ec-19fa16ee6e7e" xlink:to="loc_us-gaap_ClassOfStockDomain_019e025f-44ec-70f5-a7ec-19fa16ee6e7e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e025f-44ec-7170-842b-4466745b0fd2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e025f-44ec-70f5-a7ec-19fa16ee6e7e" xlink:to="loc_us-gaap_ClassOfStockDomain_019e025f-44ec-7170-842b-4466745b0fd2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_019e025f-44ec-77d7-b56e-e8d89a39cbd9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e025f-44ec-7170-842b-4466745b0fd2" xlink:to="loc_us-gaap_CommonClassAMember_019e025f-44ec-77d7-b56e-e8d89a39cbd9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_019e025f-44ec-7de7-9558-6eff532ff502" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e025f-44ec-7170-842b-4466745b0fd2" xlink:to="loc_us-gaap_CommonClassBMember_019e025f-44ec-7de7-9558-6eff532ff502" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_019e025f-44ec-76ec-8ff8-f4e85b48740d" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e025f-44ec-73ad-8a33-d7f334f58639" xlink:to="loc_dei_DocumentType_019e025f-44ec-76ec-8ff8-f4e85b48740d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentQuarterlyReport_019e025f-44ec-7a3f-9b18-0eab49da3d76" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentQuarterlyReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e025f-44ec-73ad-8a33-d7f334f58639" xlink:to="loc_dei_DocumentQuarterlyReport_019e025f-44ec-7a3f-9b18-0eab49da3d76" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_019e025f-44ec-7ef2-a1d6-6fb050dffa91" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e025f-44ec-73ad-8a33-d7f334f58639" xlink:to="loc_dei_DocumentPeriodEndDate_019e025f-44ec-7ef2-a1d6-6fb050dffa91" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentTransitionReport_019e025f-44ec-725f-93bf-79c9771cbfcb" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentTransitionReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e025f-44ec-73ad-8a33-d7f334f58639" xlink:to="loc_dei_DocumentTransitionReport_019e025f-44ec-725f-93bf-79c9771cbfcb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_019e025f-44ec-781b-ae94-37f277cd5de4" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e025f-44ec-73ad-8a33-d7f334f58639" xlink:to="loc_dei_EntityFileNumber_019e025f-44ec-781b-ae94-37f277cd5de4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_019e025f-44ec-7654-82d9-b554806c5e03" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e025f-44ec-73ad-8a33-d7f334f58639" xlink:to="loc_dei_EntityRegistrantName_019e025f-44ec-7654-82d9-b554806c5e03" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_019e025f-44ec-73c8-ab19-4afe07a1af8a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e025f-44ec-73ad-8a33-d7f334f58639" xlink:to="loc_dei_EntityIncorporationStateCountryCode_019e025f-44ec-73c8-ab19-4afe07a1af8a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_019e025f-44ec-7adc-9d0e-2939e0506654" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e025f-44ec-73ad-8a33-d7f334f58639" xlink:to="loc_dei_EntityTaxIdentificationNumber_019e025f-44ec-7adc-9d0e-2939e0506654" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_019e025f-44ec-7b9c-927f-948c9754a35d" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e025f-44ec-73ad-8a33-d7f334f58639" xlink:to="loc_dei_EntityAddressAddressLine1_019e025f-44ec-7b9c-927f-948c9754a35d" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_019e025f-44ec-74d5-b082-4e0650c5dcec" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e025f-44ec-73ad-8a33-d7f334f58639" xlink:to="loc_dei_EntityAddressCityOrTown_019e025f-44ec-74d5-b082-4e0650c5dcec" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_019e025f-44ec-767d-a5d4-c9e4ede2e05f" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressStateOrProvince"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e025f-44ec-73ad-8a33-d7f334f58639" xlink:to="loc_dei_EntityAddressStateOrProvince_019e025f-44ec-767d-a5d4-c9e4ede2e05f" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_019e025f-44ec-7c6c-8121-d34d43a50fc5" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e025f-44ec-73ad-8a33-d7f334f58639" xlink:to="loc_dei_EntityAddressPostalZipCode_019e025f-44ec-7c6c-8121-d34d43a50fc5" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_019e025f-44ec-719b-9bda-587a132378e6" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e025f-44ec-73ad-8a33-d7f334f58639" xlink:to="loc_dei_CityAreaCode_019e025f-44ec-719b-9bda-587a132378e6" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_019e025f-44ec-7207-9084-41f482d0e05a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e025f-44ec-73ad-8a33-d7f334f58639" xlink:to="loc_dei_LocalPhoneNumber_019e025f-44ec-7207-9084-41f482d0e05a" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_019e025f-44ec-786d-92c5-6988713cf28c" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e025f-44ec-73ad-8a33-d7f334f58639" xlink:to="loc_dei_Security12bTitle_019e025f-44ec-786d-92c5-6988713cf28c" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_019e025f-44ec-734f-b2fd-d220ff3f07d5" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e025f-44ec-73ad-8a33-d7f334f58639" xlink:to="loc_dei_TradingSymbol_019e025f-44ec-734f-b2fd-d220ff3f07d5" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_019e025f-44ec-751e-9c00-85bb4d56285c" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e025f-44ec-73ad-8a33-d7f334f58639" xlink:to="loc_dei_SecurityExchangeName_019e025f-44ec-751e-9c00-85bb4d56285c" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCurrentReportingStatus_019e025f-44ec-73ca-9cb4-bd164de7ed92" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCurrentReportingStatus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e025f-44ec-73ad-8a33-d7f334f58639" xlink:to="loc_dei_EntityCurrentReportingStatus_019e025f-44ec-73ca-9cb4-bd164de7ed92" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInteractiveDataCurrent_019e025f-44ec-7646-b36a-16d3f536f778" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityInteractiveDataCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e025f-44ec-73ad-8a33-d7f334f58639" xlink:to="loc_dei_EntityInteractiveDataCurrent_019e025f-44ec-7646-b36a-16d3f536f778" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFilerCategory_019e025f-44ec-74e6-89d6-5b3cd4db996f" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityFilerCategory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e025f-44ec-73ad-8a33-d7f334f58639" xlink:to="loc_dei_EntityFilerCategory_019e025f-44ec-74e6-89d6-5b3cd4db996f" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitySmallBusiness_019e025f-44ec-7f72-afde-4e1826f14183" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntitySmallBusiness"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e025f-44ec-73ad-8a33-d7f334f58639" xlink:to="loc_dei_EntitySmallBusiness_019e025f-44ec-7f72-afde-4e1826f14183" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_019e025f-44ec-77ef-994b-2e4606a788e4" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e025f-44ec-73ad-8a33-d7f334f58639" xlink:to="loc_dei_EntityEmergingGrowthCompany_019e025f-44ec-77ef-994b-2e4606a788e4" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany_019e025f-44ec-73c6-a3f3-a255e670794d" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityShellCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e025f-44ec-73ad-8a33-d7f334f58639" xlink:to="loc_dei_EntityShellCompany_019e025f-44ec-73c6-a3f3-a255e670794d" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_019e025f-44ec-72ad-8296-ee4221822290" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e025f-44ec-73ad-8a33-d7f334f58639" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_019e025f-44ec-72ad-8296-ee4221822290" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_019e025f-44ec-7276-ad1d-b0e16221296e" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e025f-44ec-73ad-8a33-d7f334f58639" xlink:to="loc_dei_EntityCentralIndexKey_019e025f-44ec-7276-ad1d-b0e16221296e" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalPeriodFocus_019e025f-44ec-7433-8202-a45f26b80d78" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentFiscalPeriodFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e025f-44ec-73ad-8a33-d7f334f58639" xlink:to="loc_dei_DocumentFiscalPeriodFocus_019e025f-44ec-7433-8202-a45f26b80d78" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalYearFocus_019e025f-44ec-728a-b67e-13dd8cecfd92" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentFiscalYearFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e025f-44ec-73ad-8a33-d7f334f58639" xlink:to="loc_dei_DocumentFiscalYearFocus_019e025f-44ec-728a-b67e-13dd8cecfd92" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_019e025f-44ec-72b7-8ea4-ad44315ce6e0" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e025f-44ec-73ad-8a33-d7f334f58639" xlink:to="loc_dei_AmendmentFlag_019e025f-44ec-72b7-8ea4-ad44315ce6e0" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate_019e025f-44ec-75fd-8be6-d45dcf3a047f" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CurrentFiscalYearEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e025f-44ec-73ad-8a33-d7f334f58639" xlink:to="loc_dei_CurrentFiscalYearEndDate_019e025f-44ec-75fd-8be6-d45dcf3a047f" xlink:type="arc" order="28"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workiva.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS" xlink:type="simple" xlink:href="wk-20260630.xsd#CONDENSEDCONSOLIDATEDBALANCESHEETS"/>
  <link:definitionLink xlink:role="http://www.workiva.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019e025f-44ec-79ef-a6a3-f710f715fa87" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019e025f-44ec-7cf5-a5f9-f0e30f5261ef" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019e025f-44ec-79ef-a6a3-f710f715fa87" xlink:to="loc_us-gaap_StatementTable_019e025f-44ec-7cf5-a5f9-f0e30f5261ef" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019e025f-44ec-7086-85cf-0569cd2fd813" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019e025f-44ec-7cf5-a5f9-f0e30f5261ef" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019e025f-44ec-7086-85cf-0569cd2fd813" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e025f-44ec-7086-85cf-0569cd2fd813_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e025f-44ec-7086-85cf-0569cd2fd813" xlink:to="loc_us-gaap_ClassOfStockDomain_019e025f-44ec-7086-85cf-0569cd2fd813_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e025f-44ec-7d0c-b38b-1c6bbe82fe4f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e025f-44ec-7086-85cf-0569cd2fd813" xlink:to="loc_us-gaap_ClassOfStockDomain_019e025f-44ec-7d0c-b38b-1c6bbe82fe4f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_019e025f-44ec-7bc4-b01e-da5f1a5e3649" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e025f-44ec-7d0c-b38b-1c6bbe82fe4f" xlink:to="loc_us-gaap_CommonClassAMember_019e025f-44ec-7bc4-b01e-da5f1a5e3649" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_019e025f-44ec-7a7d-ac4e-19e0781e43bb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e025f-44ec-7d0c-b38b-1c6bbe82fe4f" xlink:to="loc_us-gaap_CommonClassBMember_019e025f-44ec-7a7d-ac4e-19e0781e43bb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract_019e025f-44ec-772c-a946-333df8f508e3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e025f-44ec-79ef-a6a3-f710f715fa87" xlink:to="loc_us-gaap_AssetsAbstract_019e025f-44ec-772c-a946-333df8f508e3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrentAbstract_019e025f-44ec-7da2-8a1f-53e7b587a9b2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019e025f-44ec-772c-a946-333df8f508e3" xlink:to="loc_us-gaap_AssetsCurrentAbstract_019e025f-44ec-7da2-8a1f-53e7b587a9b2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019e025f-44ec-77dd-a30c-5ee9cc546c8a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019e025f-44ec-7da2-8a1f-53e7b587a9b2" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019e025f-44ec-77dd-a30c-5ee9cc546c8a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent_019e025f-44ec-7c93-b5c6-f49128a62afa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019e025f-44ec-7da2-8a1f-53e7b587a9b2" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent_019e025f-44ec-7c93-b5c6-f49128a62afa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_019e025f-44ec-7b2d-b05f-16bfa5103611" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019e025f-44ec-7da2-8a1f-53e7b587a9b2" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_019e025f-44ec-7b2d-b05f-16bfa5103611" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedContractCostNetCurrent_019e025f-44ec-7369-8aed-46d29d55934d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CapitalizedContractCostNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019e025f-44ec-7da2-8a1f-53e7b587a9b2" xlink:to="loc_us-gaap_CapitalizedContractCostNetCurrent_019e025f-44ec-7369-8aed-46d29d55934d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherReceivablesNetCurrent_019e025f-44ec-7d14-9a1a-52a5277f5449" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherReceivablesNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019e025f-44ec-7da2-8a1f-53e7b587a9b2" xlink:to="loc_us-gaap_OtherReceivablesNetCurrent_019e025f-44ec-7d14-9a1a-52a5277f5449" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_019e025f-44ec-7542-8869-4979707956bc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019e025f-44ec-7da2-8a1f-53e7b587a9b2" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_019e025f-44ec-7542-8869-4979707956bc" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_019e025f-44ec-7781-bc63-fe655ce32078" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019e025f-44ec-7da2-8a1f-53e7b587a9b2" xlink:to="loc_us-gaap_AssetsCurrent_019e025f-44ec-7781-bc63-fe655ce32078" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_019e025f-44ec-7163-ae15-656719efc950" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019e025f-44ec-772c-a946-333df8f508e3" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_019e025f-44ec-7163-ae15-656719efc950" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_019e025f-44ec-7dff-b0f7-125f2b2e055b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019e025f-44ec-772c-a946-333df8f508e3" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_019e025f-44ec-7dff-b0f7-125f2b2e055b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedContractCostNetNoncurrent_019e025f-44ec-757d-b79e-4f0721c26897" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CapitalizedContractCostNetNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019e025f-44ec-772c-a946-333df8f508e3" xlink:to="loc_us-gaap_CapitalizedContractCostNetNoncurrent_019e025f-44ec-757d-b79e-4f0721c26897" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019e025f-44ec-7335-a940-b7f5c4cab3e9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019e025f-44ec-772c-a946-333df8f508e3" xlink:to="loc_us-gaap_Goodwill_019e025f-44ec-7335-a940-b7f5c4cab3e9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019e025f-44ec-7b9a-a840-a44f05418345" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019e025f-44ec-772c-a946-333df8f508e3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019e025f-44ec-7b9a-a840-a44f05418345" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_019e025f-44ec-7a4a-b212-b1b88a67507b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019e025f-44ec-772c-a946-333df8f508e3" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_019e025f-44ec-7a4a-b212-b1b88a67507b" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_019e025f-44ec-7418-89bd-17caab43694a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019e025f-44ec-772c-a946-333df8f508e3" xlink:to="loc_us-gaap_Assets_019e025f-44ec-7418-89bd-17caab43694a" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019e025f-44ec-7621-b32d-df25636515c3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e025f-44ec-79ef-a6a3-f710f715fa87" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019e025f-44ec-7621-b32d-df25636515c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_019e025f-44ec-72b7-bd3b-eb37b6095f75" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019e025f-44ec-7621-b32d-df25636515c3" xlink:to="loc_us-gaap_LiabilitiesCurrentAbstract_019e025f-44ec-72b7-bd3b-eb37b6095f75" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_019e025f-44ec-7053-bd6a-a28093201302" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019e025f-44ec-72b7-bd3b-eb37b6095f75" xlink:to="loc_us-gaap_AccountsPayableCurrent_019e025f-44ec-7053-bd6a-a28093201302" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_019e025f-44ec-7562-b500-49eca08ae7fe" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccruedLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019e025f-44ec-72b7-bd3b-eb37b6095f75" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_019e025f-44ec-7562-b500-49eca08ae7fe" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_019e025f-44ec-75c1-8e1c-58246cd704ba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019e025f-44ec-72b7-bd3b-eb37b6095f75" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_019e025f-44ec-75c1-8e1c-58246cd704ba" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtCurrent_019e025f-44ec-7d62-bdad-8dd25cfbd171" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConvertibleDebtCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019e025f-44ec-72b7-bd3b-eb37b6095f75" xlink:to="loc_us-gaap_ConvertibleDebtCurrent_019e025f-44ec-7d62-bdad-8dd25cfbd171" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityCurrent_019e025f-44ec-7e30-8155-6ac57c873576" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019e025f-44ec-72b7-bd3b-eb37b6095f75" xlink:to="loc_us-gaap_FinanceLeaseLiabilityCurrent_019e025f-44ec-7e30-8155-6ac57c873576" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_019e025f-44ec-7484-8b58-d3094a4d5dbb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019e025f-44ec-72b7-bd3b-eb37b6095f75" xlink:to="loc_us-gaap_LiabilitiesCurrent_019e025f-44ec-7484-8b58-d3094a4d5dbb" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtNoncurrent_019e025f-44ec-7d8a-b12d-369a3219537c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConvertibleDebtNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019e025f-44ec-7621-b32d-df25636515c3" xlink:to="loc_us-gaap_ConvertibleDebtNoncurrent_019e025f-44ec-7d8a-b12d-369a3219537c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_019e025f-44ec-71fa-abe1-044dfca8ad07" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019e025f-44ec-7621-b32d-df25636515c3" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_019e025f-44ec-71fa-abe1-044dfca8ad07" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_019e025f-44ec-7fab-a80d-7ca8060f303b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019e025f-44ec-7621-b32d-df25636515c3" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_019e025f-44ec-7fab-a80d-7ca8060f303b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_019e025f-44ec-7ffb-8c39-ea324478df7f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019e025f-44ec-7621-b32d-df25636515c3" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_019e025f-44ec-7ffb-8c39-ea324478df7f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_019e025f-44ec-7f13-a3b3-1151f2f82026" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019e025f-44ec-7621-b32d-df25636515c3" xlink:to="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_019e025f-44ec-7f13-a3b3-1151f2f82026" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_019e025f-44ec-7fab-a5c1-032a6460efee" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Liabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019e025f-44ec-7621-b32d-df25636515c3" xlink:to="loc_us-gaap_Liabilities_019e025f-44ec-7fab-a5c1-032a6460efee" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityAbstract_019e025f-44ec-77a4-aa44-032c9dfb4477" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019e025f-44ec-7621-b32d-df25636515c3" xlink:to="loc_us-gaap_StockholdersEquityAbstract_019e025f-44ec-77a4-aa44-032c9dfb4477" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_019e025f-44ec-7c53-b07a-b6669b0650a4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_019e025f-44ec-77a4-aa44-032c9dfb4477" xlink:to="loc_us-gaap_CommonStockValue_019e025f-44ec-7c53-b07a-b6669b0650a4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockValue_019e025f-44ec-7630-b6f9-1ad1bd7a6bd9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PreferredStockValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_019e025f-44ec-77a4-aa44-032c9dfb4477" xlink:to="loc_us-gaap_PreferredStockValue_019e025f-44ec-7630-b6f9-1ad1bd7a6bd9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapital_019e025f-44ec-7da5-bd66-8cf166cee30d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdditionalPaidInCapital"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_019e025f-44ec-77a4-aa44-032c9dfb4477" xlink:to="loc_us-gaap_AdditionalPaidInCapital_019e025f-44ec-7da5-bd66-8cf166cee30d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019e025f-44ec-7a9d-b995-a370f5a337fe" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_019e025f-44ec-77a4-aa44-032c9dfb4477" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019e025f-44ec-7a9d-b995-a370f5a337fe" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_019e025f-44ec-7257-8b6c-6d131dbda0dd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_019e025f-44ec-77a4-aa44-032c9dfb4477" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_019e025f-44ec-7257-8b6c-6d131dbda0dd" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019e025f-44ec-7090-bdd3-c2748de5d096" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_019e025f-44ec-77a4-aa44-032c9dfb4477" xlink:to="loc_us-gaap_StockholdersEquity_019e025f-44ec-7090-bdd3-c2748de5d096" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_019e025f-44ec-7931-959d-d22b4f564363" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019e025f-44ec-7621-b32d-df25636515c3" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_019e025f-44ec-7931-959d-d22b4f564363" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workiva.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical" xlink:type="simple" xlink:href="wk-20260630.xsd#CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical"/>
  <link:definitionLink xlink:role="http://www.workiva.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019e025f-44ec-78b1-8656-a11ebf860d0b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019e025f-44ec-712e-8e82-c8e25a523d26" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019e025f-44ec-78b1-8656-a11ebf860d0b" xlink:to="loc_us-gaap_StatementTable_019e025f-44ec-712e-8e82-c8e25a523d26" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019e025f-44ec-745b-a4b1-a2037c56f6db" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019e025f-44ec-712e-8e82-c8e25a523d26" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019e025f-44ec-745b-a4b1-a2037c56f6db" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e025f-44ec-745b-a4b1-a2037c56f6db_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e025f-44ec-745b-a4b1-a2037c56f6db" xlink:to="loc_us-gaap_ClassOfStockDomain_019e025f-44ec-745b-a4b1-a2037c56f6db_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e025f-44ec-75fb-9cc3-0f8912fbc2fd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e025f-44ec-745b-a4b1-a2037c56f6db" xlink:to="loc_us-gaap_ClassOfStockDomain_019e025f-44ec-75fb-9cc3-0f8912fbc2fd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_019e025f-44ec-70be-a2c9-de214445fccd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e025f-44ec-75fb-9cc3-0f8912fbc2fd" xlink:to="loc_us-gaap_CommonClassAMember_019e025f-44ec-70be-a2c9-de214445fccd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_019e025f-44ec-7668-a346-1e25838271da" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e025f-44ec-75fb-9cc3-0f8912fbc2fd" xlink:to="loc_us-gaap_CommonClassBMember_019e025f-44ec-7668-a346-1e25838271da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_019e025f-44ec-7659-b6fd-2e882c6025eb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e025f-44ec-78b1-8656-a11ebf860d0b" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_019e025f-44ec-7659-b6fd-2e882c6025eb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_019e025f-44ec-7773-aad1-ab723614cf9a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e025f-44ec-78b1-8656-a11ebf860d0b" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_019e025f-44ec-7773-aad1-ab723614cf9a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_019e025f-44ec-777d-8c6f-a9fe78b88ada" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e025f-44ec-78b1-8656-a11ebf860d0b" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_019e025f-44ec-777d-8c6f-a9fe78b88ada" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesIssued_019e025f-44ec-7dc1-b41e-1cd3198f9e1c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e025f-44ec-78b1-8656-a11ebf860d0b" xlink:to="loc_us-gaap_CommonStockSharesIssued_019e025f-44ec-7dc1-b41e-1cd3198f9e1c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_019e025f-44ec-73ba-be4e-498643351a70" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e025f-44ec-78b1-8656-a11ebf860d0b" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_019e025f-44ec-73ba-be4e-498643351a70" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockParOrStatedValuePerShare_019e025f-44ec-7762-85a4-607df4f65424" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PreferredStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e025f-44ec-78b1-8656-a11ebf860d0b" xlink:to="loc_us-gaap_PreferredStockParOrStatedValuePerShare_019e025f-44ec-7762-85a4-607df4f65424" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockSharesAuthorized_019e025f-44ec-74eb-9395-98a619284622" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PreferredStockSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e025f-44ec-78b1-8656-a11ebf860d0b" xlink:to="loc_us-gaap_PreferredStockSharesAuthorized_019e025f-44ec-74eb-9395-98a619284622" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockSharesIssued_019e025f-44ec-7553-aa9c-85da9bfcce5d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PreferredStockSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e025f-44ec-78b1-8656-a11ebf860d0b" xlink:to="loc_us-gaap_PreferredStockSharesIssued_019e025f-44ec-7553-aa9c-85da9bfcce5d" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockSharesOutstanding_019e025f-44ec-70a7-95e4-9559c3231474" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PreferredStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e025f-44ec-78b1-8656-a11ebf860d0b" xlink:to="loc_us-gaap_PreferredStockSharesOutstanding_019e025f-44ec-70a7-95e4-9559c3231474" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workiva.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS" xlink:type="simple" xlink:href="wk-20260630.xsd#CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS"/>
  <link:definitionLink xlink:role="http://www.workiva.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019e025f-44ec-7679-be02-bcef89eb44e0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019e025f-44ec-76a3-8bcb-92bd085eb2bd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019e025f-44ec-7679-be02-bcef89eb44e0" xlink:to="loc_us-gaap_StatementTable_019e025f-44ec-76a3-8bcb-92bd085eb2bd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019e025f-44ec-7f58-9c7c-1206724ff3a9" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019e025f-44ec-76a3-8bcb-92bd085eb2bd" xlink:to="loc_srt_ProductOrServiceAxis_019e025f-44ec-7f58-9c7c-1206724ff3a9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019e025f-44ec-7f58-9c7c-1206724ff3a9_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019e025f-44ec-7f58-9c7c-1206724ff3a9" xlink:to="loc_srt_ProductsAndServicesDomain_019e025f-44ec-7f58-9c7c-1206724ff3a9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019e025f-44ec-7804-bbf5-67ae5cee333d" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019e025f-44ec-7f58-9c7c-1206724ff3a9" xlink:to="loc_srt_ProductsAndServicesDomain_019e025f-44ec-7804-bbf5-67ae5cee333d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LicenseAndServiceMember_019e025f-44ec-7f29-94be-d8157d984403" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LicenseAndServiceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e025f-44ec-7804-bbf5-67ae5cee333d" xlink:to="loc_us-gaap_LicenseAndServiceMember_019e025f-44ec-7f29-94be-d8157d984403" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wk_ProfessionalServicesMember_019e025f-44ec-7462-881b-84569a81a7fb" xlink:href="wk-20260630.xsd#wk_ProfessionalServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e025f-44ec-7804-bbf5-67ae5cee333d" xlink:to="loc_wk_ProfessionalServicesMember_019e025f-44ec-7462-881b-84569a81a7fb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesAbstract_019e025f-44ec-77f2-b2cd-21c78587346e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenuesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e025f-44ec-7679-be02-bcef89eb44e0" xlink:to="loc_us-gaap_RevenuesAbstract_019e025f-44ec-77f2-b2cd-21c78587346e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e025f-44ec-7326-ac40-166f80019400" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_019e025f-44ec-77f2-b2cd-21c78587346e" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e025f-44ec-7326-ac40-166f80019400" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSoldAbstract_019e025f-44ec-7b0a-ad33-c8ad7e36ec76" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostOfGoodsAndServicesSoldAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e025f-44ec-7679-be02-bcef89eb44e0" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSoldAbstract_019e025f-44ec-7b0a-ad33-c8ad7e36ec76" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_019e025f-44ec-761f-882a-96dba45dd263" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfGoodsAndServicesSoldAbstract_019e025f-44ec-7b0a-ad33-c8ad7e36ec76" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_019e025f-44ec-761f-882a-96dba45dd263" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_019e025f-44ec-7f0b-9a19-480be62b1e06" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GrossProfit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e025f-44ec-7679-be02-bcef89eb44e0" xlink:to="loc_us-gaap_GrossProfit_019e025f-44ec-7f0b-9a19-480be62b1e06" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpensesAbstract_019e025f-44ec-7c36-9064-e2a64dc45149" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingExpensesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e025f-44ec-7679-be02-bcef89eb44e0" xlink:to="loc_us-gaap_OperatingExpensesAbstract_019e025f-44ec-7c36-9064-e2a64dc45149" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_019e025f-44ec-70f7-ab49-16e5944e415b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ResearchAndDevelopmentExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019e025f-44ec-7c36-9064-e2a64dc45149" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_019e025f-44ec-70f7-ab49-16e5944e415b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingAndMarketingExpense_019e025f-44ec-7434-80b9-497c26f7f009" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SellingAndMarketingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019e025f-44ec-7c36-9064-e2a64dc45149" xlink:to="loc_us-gaap_SellingAndMarketingExpense_019e025f-44ec-7434-80b9-497c26f7f009" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_019e025f-44ec-762e-8195-10eb46845016" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019e025f-44ec-7c36-9064-e2a64dc45149" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_019e025f-44ec-762e-8195-10eb46845016" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_019e025f-44ec-7ff1-a01e-f936d4fc67d7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019e025f-44ec-7c36-9064-e2a64dc45149" xlink:to="loc_us-gaap_OperatingExpenses_019e025f-44ec-7ff1-a01e-f936d4fc67d7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_019e025f-44ec-7fd9-a365-fedbc1d4b2cb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e025f-44ec-7679-be02-bcef89eb44e0" xlink:to="loc_us-gaap_OperatingIncomeLoss_019e025f-44ec-7fd9-a365-fedbc1d4b2cb" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeInterest_019e025f-44ec-7156-9da2-1d9caca653bf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentIncomeInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e025f-44ec-7679-be02-bcef89eb44e0" xlink:to="loc_us-gaap_InvestmentIncomeInterest_019e025f-44ec-7156-9da2-1d9caca653bf" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseNonoperating_019e025f-44ec-7258-9a6c-c0f38c1d8233" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestExpenseNonoperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e025f-44ec-7679-be02-bcef89eb44e0" xlink:to="loc_us-gaap_InterestExpenseNonoperating_019e025f-44ec-7258-9a6c-c0f38c1d8233" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_019e025f-44ec-7b7c-8106-e9e371d95112" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e025f-44ec-7679-be02-bcef89eb44e0" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_019e025f-44ec-7b7c-8106-e9e371d95112" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019e025f-44ec-7c14-a840-fdd086fe81ba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e025f-44ec-7679-be02-bcef89eb44e0" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019e025f-44ec-7c14-a840-fdd086fe81ba" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019e025f-44ec-798d-b534-051a4039c5fd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e025f-44ec-7679-be02-bcef89eb44e0" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019e025f-44ec-798d-b534-051a4039c5fd" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019e025f-44ec-7af5-9279-21231f381f95" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e025f-44ec-7679-be02-bcef89eb44e0" xlink:to="loc_us-gaap_NetIncomeLoss_019e025f-44ec-7af5-9279-21231f381f95" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_wk_EPSBasicAndDilutedAbstract_019e025f-44ec-71fd-87a1-cc16389c449a" xlink:href="wk-20260630.xsd#wk_EPSBasicAndDilutedAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e025f-44ec-7679-be02-bcef89eb44e0" xlink:to="loc_wk_EPSBasicAndDilutedAbstract_019e025f-44ec-71fd-87a1-cc16389c449a" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_019e025f-44ec-7b31-a27a-936812b56e0e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wk_EPSBasicAndDilutedAbstract_019e025f-44ec-71fd-87a1-cc16389c449a" xlink:to="loc_us-gaap_EarningsPerShareBasic_019e025f-44ec-7b31-a27a-936812b56e0e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_019e025f-44ec-74d1-aa29-dc6ffd0195b1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wk_EPSBasicAndDilutedAbstract_019e025f-44ec-71fd-87a1-cc16389c449a" xlink:to="loc_us-gaap_EarningsPerShareDiluted_019e025f-44ec-74d1-aa29-dc6ffd0195b1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_019e025f-44ec-74ef-b146-2e649b282109" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e025f-44ec-7679-be02-bcef89eb44e0" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_019e025f-44ec-74ef-b146-2e649b282109" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019e025f-44ec-7f78-9aa8-b6ce5b0644a0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_019e025f-44ec-74ef-b146-2e649b282109" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019e025f-44ec-7f78-9aa8-b6ce5b0644a0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019e025f-44ec-7a56-a148-18e8e70afa06" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_019e025f-44ec-74ef-b146-2e649b282109" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019e025f-44ec-7a56-a148-18e8e70afa06" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workiva.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCHANGESINSTOCKHOLDERSDEFICIT" xlink:type="simple" xlink:href="wk-20260630.xsd#CONDENSEDCONSOLIDATEDSTATEMENTSOFCHANGESINSTOCKHOLDERSDEFICIT"/>
  <link:definitionLink xlink:role="http://www.workiva.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCHANGESINSTOCKHOLDERSDEFICIT" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019e025f-44ec-7b12-b68c-a9d0c033fcd9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019e025f-44ec-7d21-bd35-ca0456ed5ae5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019e025f-44ec-7b12-b68c-a9d0c033fcd9" xlink:to="loc_us-gaap_StatementTable_019e025f-44ec-7d21-bd35-ca0456ed5ae5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019e025f-44ec-701f-8d84-7419cb317239" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019e025f-44ec-7d21-bd35-ca0456ed5ae5" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019e025f-44ec-701f-8d84-7419cb317239" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019e025f-44ec-701f-8d84-7419cb317239_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019e025f-44ec-701f-8d84-7419cb317239" xlink:to="loc_us-gaap_EquityComponentDomain_019e025f-44ec-701f-8d84-7419cb317239_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019e025f-44ec-7c7f-99ed-a4ec785439e6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019e025f-44ec-701f-8d84-7419cb317239" xlink:to="loc_us-gaap_EquityComponentDomain_019e025f-44ec-7c7f-99ed-a4ec785439e6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019e025f-44ec-79ff-8a4b-2246eff7060d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e025f-44ec-7c7f-99ed-a4ec785439e6" xlink:to="loc_us-gaap_CommonStockMember_019e025f-44ec-79ff-8a4b-2246eff7060d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_019e025f-44ec-7429-88f1-862765770f2d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e025f-44ec-7c7f-99ed-a4ec785439e6" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_019e025f-44ec-7429-88f1-862765770f2d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019e025f-44ec-7bc9-92d9-26ebc7e20352" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e025f-44ec-7c7f-99ed-a4ec785439e6" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019e025f-44ec-7bc9-92d9-26ebc7e20352" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_019e025f-44ec-77da-ab6c-a897ab190442" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e025f-44ec-7c7f-99ed-a4ec785439e6" xlink:to="loc_us-gaap_RetainedEarningsMember_019e025f-44ec-77da-ab6c-a897ab190442" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e025f-44ec-7158-b25b-a200c39c72c3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e025f-44ec-7b12-b68c-a9d0c033fcd9" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e025f-44ec-7158-b25b-a200c39c72c3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesOutstanding_019e025f-44ec-7e6c-a834-7e1b9fd39f5c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e025f-44ec-7158-b25b-a200c39c72c3" xlink:to="loc_us-gaap_SharesOutstanding_019e025f-44ec-7e6c-a834-7e1b9fd39f5c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019e025f-44ec-7918-a6f1-65714827e43d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e025f-44ec-7158-b25b-a200c39c72c3" xlink:to="loc_us-gaap_StockholdersEquity_019e025f-44ec-7918-a6f1-65714827e43d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_019e025f-44ec-7a13-95f7-eefb6220cade" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e025f-44ec-7158-b25b-a200c39c72c3" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_019e025f-44ec-7a13-95f7-eefb6220cade" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_019e025f-44ec-7599-87ca-c098fa9d8c74" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e025f-44ec-7158-b25b-a200c39c72c3" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_019e025f-44ec-7599-87ca-c098fa9d8c74" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_019e025f-44ec-7364-bc3a-e427faf2f0c9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e025f-44ec-7158-b25b-a200c39c72c3" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_019e025f-44ec-7364-bc3a-e427faf2f0c9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_019e025f-44ec-7208-8a8a-d99e4cc8921f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e025f-44ec-7158-b25b-a200c39c72c3" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_019e025f-44ec-7208-8a8a-d99e4cc8921f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_019e025f-44ec-7400-b36c-08a1f47f0ede" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e025f-44ec-7158-b25b-a200c39c72c3" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_019e025f-44ec-7400-b36c-08a1f47f0ede" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross_019e025f-44ec-7971-a15d-7119c996eb9d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e025f-44ec-7158-b25b-a200c39c72c3" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross_019e025f-44ec-7971-a15d-7119c996eb9d" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_019e025f-44ec-780e-b6be-3326258b532b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e025f-44ec-7158-b25b-a200c39c72c3" xlink:to="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_019e025f-44ec-780e-b6be-3326258b532b" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_019e025f-44ec-78fa-986e-729ec820ac39" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e025f-44ec-7158-b25b-a200c39c72c3" xlink:to="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_019e025f-44ec-78fa-986e-729ec820ac39" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodShares_019e025f-44ec-71ff-adbc-3eced35f8f97" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockRepurchasedDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e025f-44ec-7158-b25b-a200c39c72c3" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodShares_019e025f-44ec-71ff-adbc-3eced35f8f97" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodValue_019e025f-44ec-7c57-a6cb-ec17bba11916" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockRepurchasedDuringPeriodValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e025f-44ec-7158-b25b-a200c39c72c3" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodValue_019e025f-44ec-7c57-a6cb-ec17bba11916" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019e025f-44ec-745b-8136-c167a4aff462" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e025f-44ec-7158-b25b-a200c39c72c3" xlink:to="loc_us-gaap_NetIncomeLoss_019e025f-44ec-745b-8136-c167a4aff462" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019e025f-44ec-76e1-ab81-96143a02cf9f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e025f-44ec-7158-b25b-a200c39c72c3" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019e025f-44ec-76e1-ab81-96143a02cf9f" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesOutstanding_019e025f-44ec-74c5-b46a-f4dd3de3c599" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019e025f-44ec-7df7-ae34-98c63fd48fa6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workiva.com/role/CashEquivalentsandMarketableSecuritiesScheduleofMarketableSecuritiesDetails" xlink:type="simple" xlink:href="wk-20260630.xsd#CashEquivalentsandMarketableSecuritiesScheduleofMarketableSecuritiesDetails"/>
  <link:definitionLink xlink:role="http://www.workiva.com/role/CashEquivalentsandMarketableSecuritiesScheduleofMarketableSecuritiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsLineItems_019e025f-45ab-7c63-a160-c81146ed4a5c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfCashAndCashEquivalentsTable_019e025f-45ab-7295-80b5-4c063b4e6add" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfCashAndCashEquivalentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_CashAndCashEquivalentsLineItems_019e025f-45ab-7c63-a160-c81146ed4a5c" xlink:to="loc_us-gaap_ScheduleOfCashAndCashEquivalentsTable_019e025f-45ab-7295-80b5-4c063b4e6add" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAxis_019e025f-45ab-7403-bddb-b76be2392429" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfCashAndCashEquivalentsTable_019e025f-45ab-7295-80b5-4c063b4e6add" xlink:to="loc_us-gaap_CashAndCashEquivalentsAxis_019e025f-45ab-7403-bddb-b76be2392429" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019e025f-45ab-7403-bddb-b76be2392429_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_019e025f-45ab-7403-bddb-b76be2392429" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019e025f-45ab-7403-bddb-b76be2392429_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019e025f-45ab-77c8-8cf6-72078abe9b2f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_019e025f-45ab-7403-bddb-b76be2392429" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019e025f-45ab-77c8-8cf6-72078abe9b2f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MoneyMarketFundsMember_019e025f-45ab-7d60-8468-6f557906967f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MoneyMarketFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019e025f-45ab-77c8-8cf6-72078abe9b2f" xlink:to="loc_us-gaap_MoneyMarketFundsMember_019e025f-45ab-7d60-8468-6f557906967f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashEquivalentsMember_019e025f-45ab-738f-aa03-d08f06b5f660" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019e025f-45ab-77c8-8cf6-72078abe9b2f" xlink:to="loc_us-gaap_CashEquivalentsMember_019e025f-45ab-738f-aa03-d08f06b5f660" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019e025f-45ab-74fc-975b-ac772f547c54" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashAndCashEquivalentsLineItems_019e025f-45ab-7c63-a160-c81146ed4a5c" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019e025f-45ab-74fc-975b-ac772f547c54" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wk_CashAndCashEquivalentsAccumulatedGrossUnrealizedGainBeforeTax_019e025f-45ab-7b6e-a58b-23b88c3101cb" xlink:href="wk-20260630.xsd#wk_CashAndCashEquivalentsAccumulatedGrossUnrealizedGainBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashAndCashEquivalentsLineItems_019e025f-45ab-7c63-a160-c81146ed4a5c" xlink:to="loc_wk_CashAndCashEquivalentsAccumulatedGrossUnrealizedGainBeforeTax_019e025f-45ab-7b6e-a58b-23b88c3101cb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_019e025f-45ab-772d-ae7e-1ecc4007ea93" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashAndCashEquivalentsLineItems_019e025f-45ab-7c63-a160-c81146ed4a5c" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_019e025f-45ab-772d-ae7e-1ecc4007ea93" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e025f-45ab-7f95-b673-b036a3051432" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019e025f-45ab-745d-ac66-23e52fbabea3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e025f-45ab-7f95-b673-b036a3051432" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019e025f-45ab-745d-ac66-23e52fbabea3" xlink:type="arc" order="2" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019e025f-45ab-7fa2-b1ab-39a41d7bbe52" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019e025f-45ab-745d-ac66-23e52fbabea3" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019e025f-45ab-7fa2-b1ab-39a41d7bbe52" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e025f-45ab-7fa2-b1ab-39a41d7bbe52_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e025f-45ab-7fa2-b1ab-39a41d7bbe52" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e025f-45ab-7fa2-b1ab-39a41d7bbe52_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e025f-45ab-7516-a618-afd6fbcc11b0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e025f-45ab-7fa2-b1ab-39a41d7bbe52" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e025f-45ab-7516-a618-afd6fbcc11b0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_019e025f-45ab-737e-bc5f-a62d18870294" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommercialPaperMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e025f-45ab-7516-a618-afd6fbcc11b0" xlink:to="loc_us-gaap_CommercialPaperMember_019e025f-45ab-737e-bc5f-a62d18870294" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasurySecuritiesMember_019e025f-45ab-72a2-9ae6-c0655e614518" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_USTreasurySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e025f-45ab-7516-a618-afd6fbcc11b0" xlink:to="loc_us-gaap_USTreasurySecuritiesMember_019e025f-45ab-72a2-9ae6-c0655e614518" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_019e025f-45ab-73f1-96af-1b07ce19573a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_USGovernmentAgenciesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e025f-45ab-7516-a618-afd6fbcc11b0" xlink:to="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_019e025f-45ab-73f1-96af-1b07ce19573a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_019e025f-45ab-7603-aaae-2ffabded2b7c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e025f-45ab-7516-a618-afd6fbcc11b0" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_019e025f-45ab-7603-aaae-2ffabded2b7c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_019e025f-45ab-73d8-a666-f7da3fb5ccd1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e025f-45ab-7f95-b673-b036a3051432" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_019e025f-45ab-73d8-a666-f7da3fb5ccd1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_019e025f-45ab-7d9b-9d56-01e9ca1e762f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e025f-45ab-7f95-b673-b036a3051432" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_019e025f-45ab-7d9b-9d56-01e9ca1e762f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_019e025f-45ab-7dd7-9dc6-54314b40aef4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e025f-45ab-7f95-b673-b036a3051432" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_019e025f-45ab-7dd7-9dc6-54314b40aef4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_019e025f-45ab-7c8b-a02c-c2ea87d02845" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e025f-45ab-7f95-b673-b036a3051432" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_019e025f-45ab-7c8b-a02c-c2ea87d02845" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_wk_CashCashEquivalentsAndAvailableForSaleDebtSecuritiesAmortizedCost_019e025f-45ab-73ec-86de-b3b74355a401" xlink:href="wk-20260630.xsd#wk_CashCashEquivalentsAndAvailableForSaleDebtSecuritiesAmortizedCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e025f-45ab-7f95-b673-b036a3051432" xlink:to="loc_wk_CashCashEquivalentsAndAvailableForSaleDebtSecuritiesAmortizedCost_019e025f-45ab-73ec-86de-b3b74355a401" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_wk_CashAndCashEquivalentsAndDebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedGainBeforeTax_019e025f-45ab-77d3-8ca5-9f53ca582918" xlink:href="wk-20260630.xsd#wk_CashAndCashEquivalentsAndDebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedGainBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e025f-45ab-7f95-b673-b036a3051432" xlink:to="loc_wk_CashAndCashEquivalentsAndDebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedGainBeforeTax_019e025f-45ab-77d3-8ca5-9f53ca582918" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_wk_CashAndCashEquivalentsAndDebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedLossBeforeTax_019e025f-45ab-7886-8719-7cb3e9bc4b18" xlink:href="wk-20260630.xsd#wk_CashAndCashEquivalentsAndDebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedLossBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e025f-45ab-7f95-b673-b036a3051432" xlink:to="loc_wk_CashAndCashEquivalentsAndDebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedLossBeforeTax_019e025f-45ab-7886-8719-7cb3e9bc4b18" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_wk_CashCashEquivalentsAndAvailableForSaleDebtSecurities_019e025f-45ab-77dd-b268-0e85ea74d0ca" xlink:href="wk-20260630.xsd#wk_CashCashEquivalentsAndAvailableForSaleDebtSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e025f-45ab-7f95-b673-b036a3051432" xlink:to="loc_wk_CashCashEquivalentsAndAvailableForSaleDebtSecurities_019e025f-45ab-77dd-b268-0e85ea74d0ca" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workiva.com/role/CashEquivalentsandMarketableSecuritiesContinuousUnrealizedLossPositionDetails" xlink:type="simple" xlink:href="wk-20260630.xsd#CashEquivalentsandMarketableSecuritiesContinuousUnrealizedLossPositionDetails"/>
  <link:definitionLink xlink:role="http://www.workiva.com/role/CashEquivalentsandMarketableSecuritiesContinuousUnrealizedLossPositionDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_019e025f-45ab-7996-89be-7950be570312" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionFairValueTable_019e025f-45ab-7451-8521-1fc06786ee91" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionFairValueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_019e025f-45ab-7996-89be-7950be570312" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionFairValueTable_019e025f-45ab-7451-8521-1fc06786ee91" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019e025f-45ab-72f6-b586-432f91c0f2d4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionFairValueTable_019e025f-45ab-7451-8521-1fc06786ee91" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019e025f-45ab-72f6-b586-432f91c0f2d4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e025f-45ab-72f6-b586-432f91c0f2d4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e025f-45ab-72f6-b586-432f91c0f2d4" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e025f-45ab-72f6-b586-432f91c0f2d4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e025f-45ab-7f70-b53b-4e10f411c5f3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e025f-45ab-72f6-b586-432f91c0f2d4" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e025f-45ab-7f70-b53b-4e10f411c5f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasurySecuritiesMember_019e025f-45ab-715e-9a8c-e331ada8fdc2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_USTreasurySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e025f-45ab-7f70-b53b-4e10f411c5f3" xlink:to="loc_us-gaap_USTreasurySecuritiesMember_019e025f-45ab-715e-9a8c-e331ada8fdc2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_019e025f-45ab-7df5-8596-6de3137b997d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_USGovernmentAgenciesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e025f-45ab-7f70-b53b-4e10f411c5f3" xlink:to="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_019e025f-45ab-7df5-8596-6de3137b997d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_019e025f-45ab-7549-93c6-92bf2675ac9e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e025f-45ab-7f70-b53b-4e10f411c5f3" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_019e025f-45ab-7549-93c6-92bf2675ac9e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableforSaleUnrealizedLossPositionAbstract_019e025f-45ab-7a4d-9a34-6164c1443e57" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableforSaleUnrealizedLossPositionAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_019e025f-45ab-7996-89be-7950be570312" xlink:to="loc_us-gaap_DebtSecuritiesAvailableforSaleUnrealizedLossPositionAbstract_019e025f-45ab-7a4d-9a34-6164c1443e57" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_019e025f-45ab-752f-88cd-db03fadfd7cf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesAvailableforSaleUnrealizedLossPositionAbstract_019e025f-45ab-7a4d-9a34-6164c1443e57" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_019e025f-45ab-752f-88cd-db03fadfd7cf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_019e025f-45ab-756a-93ab-61c0cd76613a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesAvailableforSaleUnrealizedLossPositionAbstract_019e025f-45ab-7a4d-9a34-6164c1443e57" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_019e025f-45ab-756a-93ab-61c0cd76613a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_019e025f-45ab-7a0b-91a9-ebc3653d2833" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_019e025f-45ab-7996-89be-7950be570312" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_019e025f-45ab-7a0b-91a9-ebc3653d2833" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_019e025f-45ab-7d46-99a9-34abc4eafc3a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_019e025f-45ab-7a0b-91a9-ebc3653d2833" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_019e025f-45ab-7d46-99a9-34abc4eafc3a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_019e025f-45ab-7ca1-9cb7-403cd258e788" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_019e025f-45ab-7a0b-91a9-ebc3653d2833" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_019e025f-45ab-7ca1-9cb7-403cd258e788" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workiva.com/role/FairValueMeasurementsDetails" xlink:type="simple" xlink:href="wk-20260630.xsd#FairValueMeasurementsDetails"/>
  <link:definitionLink xlink:role="http://www.workiva.com/role/FairValueMeasurementsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e025f-45ab-7447-827c-2fb92b4fc4bc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e025f-45ab-7a3b-9a42-38b0687feff2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e025f-45ab-7447-827c-2fb92b4fc4bc" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e025f-45ab-7a3b-9a42-38b0687feff2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e025f-45ab-7b95-87b1-1edf1d623eeb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e025f-45ab-7a3b-9a42-38b0687feff2" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e025f-45ab-7b95-87b1-1edf1d623eeb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e025f-45ab-7b95-87b1-1edf1d623eeb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e025f-45ab-7b95-87b1-1edf1d623eeb" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e025f-45ab-7b95-87b1-1edf1d623eeb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e025f-45ab-7cb2-b902-5c281ffed91d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e025f-45ab-7b95-87b1-1edf1d623eeb" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e025f-45ab-7cb2-b902-5c281ffed91d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_019e025f-45ab-723e-95eb-34f1d67ac90d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e025f-45ab-7cb2-b902-5c281ffed91d" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_019e025f-45ab-723e-95eb-34f1d67ac90d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019e025f-45ab-7122-8950-622dc65cddaa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e025f-45ab-7cb2-b902-5c281ffed91d" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019e025f-45ab-7122-8950-622dc65cddaa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAxis_019e025f-45ab-7ebb-ab50-8710d5de649c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e025f-45ab-7a3b-9a42-38b0687feff2" xlink:to="loc_us-gaap_CashAndCashEquivalentsAxis_019e025f-45ab-7ebb-ab50-8710d5de649c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019e025f-45ab-7ebb-ab50-8710d5de649c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_019e025f-45ab-7ebb-ab50-8710d5de649c" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019e025f-45ab-7ebb-ab50-8710d5de649c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019e025f-45ab-7e74-92f3-e739ddeee6f2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_019e025f-45ab-7ebb-ab50-8710d5de649c" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019e025f-45ab-7e74-92f3-e739ddeee6f2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MoneyMarketFundsMember_019e025f-45ab-7183-8b99-c192ce463b07" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MoneyMarketFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019e025f-45ab-7e74-92f3-e739ddeee6f2" xlink:to="loc_us-gaap_MoneyMarketFundsMember_019e025f-45ab-7183-8b99-c192ce463b07" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashEquivalentsMember_019e025f-45ab-7d3b-b6b4-c6567e942f33" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019e025f-45ab-7e74-92f3-e739ddeee6f2" xlink:to="loc_us-gaap_CashEquivalentsMember_019e025f-45ab-7d3b-b6b4-c6567e942f33" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019e025f-45ab-7fc9-845b-b2bcd68f1f62" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e025f-45ab-7a3b-9a42-38b0687feff2" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019e025f-45ab-7fc9-845b-b2bcd68f1f62" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e025f-45ab-7fc9-845b-b2bcd68f1f62_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e025f-45ab-7fc9-845b-b2bcd68f1f62" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e025f-45ab-7fc9-845b-b2bcd68f1f62_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e025f-45ab-7646-b069-cf9ba0bd0201" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e025f-45ab-7fc9-845b-b2bcd68f1f62" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e025f-45ab-7646-b069-cf9ba0bd0201" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_019e025f-45ab-7d57-9a54-7f608da7f813" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommercialPaperMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e025f-45ab-7646-b069-cf9ba0bd0201" xlink:to="loc_us-gaap_CommercialPaperMember_019e025f-45ab-7d57-9a54-7f608da7f813" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasurySecuritiesMember_019e025f-45ab-77a4-b378-3fe1226caeff" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_USTreasurySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e025f-45ab-7646-b069-cf9ba0bd0201" xlink:to="loc_us-gaap_USTreasurySecuritiesMember_019e025f-45ab-77a4-b378-3fe1226caeff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_019e025f-45ab-7ecf-8a35-dea3cf76514e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_USGovernmentAgenciesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e025f-45ab-7646-b069-cf9ba0bd0201" xlink:to="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_019e025f-45ab-7ecf-8a35-dea3cf76514e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_019e025f-45ab-7a58-9424-08aab3d5a2df" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e025f-45ab-7646-b069-cf9ba0bd0201" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_019e025f-45ab-7a58-9424-08aab3d5a2df" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019e025f-45ab-76bc-9092-68821d1ad11a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e025f-45ab-7a3b-9a42-38b0687feff2" xlink:to="loc_us-gaap_DebtInstrumentAxis_019e025f-45ab-76bc-9092-68821d1ad11a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e025f-45ab-76bc-9092-68821d1ad11a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019e025f-45ab-76bc-9092-68821d1ad11a" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e025f-45ab-76bc-9092-68821d1ad11a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e025f-45ab-79d8-b026-018845f7cd27" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019e025f-45ab-76bc-9092-68821d1ad11a" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e025f-45ab-79d8-b026-018845f7cd27" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wk_OnePointOneTwoFivePercentConvertibleSeniorNotesDue2026Member_019e025f-45ab-729e-a67c-1d8a6df5cc63" xlink:href="wk-20260630.xsd#wk_OnePointOneTwoFivePercentConvertibleSeniorNotesDue2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e025f-45ab-79d8-b026-018845f7cd27" xlink:to="loc_wk_OnePointOneTwoFivePercentConvertibleSeniorNotesDue2026Member_019e025f-45ab-729e-a67c-1d8a6df5cc63" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wk_OnePointTwoFivePercentConvertibleSeniorNotesDue2028Member_019e025f-45ab-70cb-a5c8-11e820aee100" xlink:href="wk-20260630.xsd#wk_OnePointTwoFivePercentConvertibleSeniorNotesDue2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e025f-45ab-79d8-b026-018845f7cd27" xlink:to="loc_wk_OnePointTwoFivePercentConvertibleSeniorNotesDue2028Member_019e025f-45ab-70cb-a5c8-11e820aee100" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_019e025f-45ab-712d-9b22-aaafc962aa6a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e025f-45ab-7447-827c-2fb92b4fc4bc" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_019e025f-45ab-712d-9b22-aaafc962aa6a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_019e025f-45ab-7acb-8af1-a7172b23af91" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e025f-45ab-7447-827c-2fb92b4fc4bc" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_019e025f-45ab-7acb-8af1-a7172b23af91" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wk_CashCashEquivalentsAndAvailableForSaleDebtSecurities_019e025f-45ab-7be8-99a5-cb279b790b6b" xlink:href="wk-20260630.xsd#wk_CashCashEquivalentsAndAvailableForSaleDebtSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e025f-45ab-7447-827c-2fb92b4fc4bc" xlink:to="loc_wk_CashCashEquivalentsAndAvailableForSaleDebtSecurities_019e025f-45ab-7be8-99a5-cb279b790b6b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_019e025f-45ab-77e6-a2d9-2974abf3ff60" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e025f-45ab-7447-827c-2fb92b4fc4bc" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_019e025f-45ab-77e6-a2d9-2974abf3ff60" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtFairValueDisclosures_019e025f-45ab-742e-a3a1-fc86411d9b04" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConvertibleDebtFairValueDisclosures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e025f-45ab-7447-827c-2fb92b4fc4bc" xlink:to="loc_us-gaap_ConvertibleDebtFairValueDisclosures_019e025f-45ab-742e-a3a1-fc86411d9b04" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workiva.com/role/ConvertibleSeniorNotesSummaryofConvertibleDebtDetails" xlink:type="simple" xlink:href="wk-20260630.xsd#ConvertibleSeniorNotesSummaryofConvertibleDebtDetails"/>
  <link:definitionLink xlink:role="http://www.workiva.com/role/ConvertibleSeniorNotesSummaryofConvertibleDebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019e025f-45ab-728c-8f25-8e9df0b6091b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019e025f-45ab-778b-acc2-e5e3e30badcf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e025f-45ab-728c-8f25-8e9df0b6091b" xlink:to="loc_us-gaap_DebtInstrumentTable_019e025f-45ab-778b-acc2-e5e3e30badcf" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019e025f-45ab-75e6-9c94-df09cd2e75a3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e025f-45ab-778b-acc2-e5e3e30badcf" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019e025f-45ab-75e6-9c94-df09cd2e75a3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019e025f-45ab-75e6-9c94-df09cd2e75a3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019e025f-45ab-75e6-9c94-df09cd2e75a3" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019e025f-45ab-75e6-9c94-df09cd2e75a3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019e025f-45ab-7585-85ca-3dd25a5592e9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019e025f-45ab-75e6-9c94-df09cd2e75a3" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019e025f-45ab-7585-85ca-3dd25a5592e9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtMember_019e025f-45ab-7882-bb6b-b35c9d54e79d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConvertibleDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019e025f-45ab-7585-85ca-3dd25a5592e9" xlink:to="loc_us-gaap_ConvertibleDebtMember_019e025f-45ab-7882-bb6b-b35c9d54e79d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019e025f-45ab-7d55-b02a-1dabc73e581d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e025f-45ab-778b-acc2-e5e3e30badcf" xlink:to="loc_us-gaap_DebtInstrumentAxis_019e025f-45ab-7d55-b02a-1dabc73e581d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e025f-45ab-7d55-b02a-1dabc73e581d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019e025f-45ab-7d55-b02a-1dabc73e581d" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e025f-45ab-7d55-b02a-1dabc73e581d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e025f-45ab-724d-8500-ae2bbeec8e24" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019e025f-45ab-7d55-b02a-1dabc73e581d" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e025f-45ab-724d-8500-ae2bbeec8e24" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wk_OnePointOneTwoFivePercentConvertibleSeniorNotesDue2026Member_019e025f-45ab-78ed-bdb6-6730d2be64f4" xlink:href="wk-20260630.xsd#wk_OnePointOneTwoFivePercentConvertibleSeniorNotesDue2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e025f-45ab-724d-8500-ae2bbeec8e24" xlink:to="loc_wk_OnePointOneTwoFivePercentConvertibleSeniorNotesDue2026Member_019e025f-45ab-78ed-bdb6-6730d2be64f4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wk_OnePointTwoFivePercentConvertibleSeniorNotesDue2028Member_019e025f-45ab-7e23-adf1-a362409c4517" xlink:href="wk-20260630.xsd#wk_OnePointTwoFivePercentConvertibleSeniorNotesDue2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e025f-45ab-724d-8500-ae2bbeec8e24" xlink:to="loc_wk_OnePointTwoFivePercentConvertibleSeniorNotesDue2028Member_019e025f-45ab-7e23-adf1-a362409c4517" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_019e025f-45ab-72f3-b3b0-0dd52266cac0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e025f-45ab-728c-8f25-8e9df0b6091b" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_019e025f-45ab-72f3-b3b0-0dd52266cac0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleConversionRatio1_019e025f-45ab-7633-abe0-fdbaa572e944" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentConvertibleConversionRatio1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e025f-45ab-728c-8f25-8e9df0b6091b" xlink:to="loc_us-gaap_DebtInstrumentConvertibleConversionRatio1_019e025f-45ab-7633-abe0-fdbaa572e944" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1_019e025f-45ab-74b2-ade3-3bbdd1da2e39" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentConvertibleConversionPrice1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e025f-45ab-728c-8f25-8e9df0b6091b" xlink:to="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1_019e025f-45ab-74b2-ade3-3bbdd1da2e39" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workiva.com/role/ConvertibleSeniorNotesNarrativeDetails" xlink:type="simple" xlink:href="wk-20260630.xsd#ConvertibleSeniorNotesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.workiva.com/role/ConvertibleSeniorNotesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019e025f-45ab-7da4-889d-98e56eef183e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019e025f-45ab-7236-9b50-2d0648a74744" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e025f-45ab-7da4-889d-98e56eef183e" xlink:to="loc_us-gaap_DebtInstrumentTable_019e025f-45ab-7236-9b50-2d0648a74744" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019e025f-45ab-78e7-a36f-576c5a411245" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e025f-45ab-7236-9b50-2d0648a74744" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019e025f-45ab-78e7-a36f-576c5a411245" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019e025f-45ab-78e7-a36f-576c5a411245_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019e025f-45ab-78e7-a36f-576c5a411245" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019e025f-45ab-78e7-a36f-576c5a411245_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019e025f-45ab-7ece-ba9c-939cfbff4e1b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019e025f-45ab-78e7-a36f-576c5a411245" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019e025f-45ab-7ece-ba9c-939cfbff4e1b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtMember_019e025f-45ab-7bbb-a410-3a47030be8ce" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConvertibleDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019e025f-45ab-7ece-ba9c-939cfbff4e1b" xlink:to="loc_us-gaap_ConvertibleDebtMember_019e025f-45ab-7bbb-a410-3a47030be8ce" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019e025f-45ab-7579-a0b8-e6fa99ed749d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e025f-45ab-7236-9b50-2d0648a74744" xlink:to="loc_us-gaap_DebtInstrumentAxis_019e025f-45ab-7579-a0b8-e6fa99ed749d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e025f-45ab-7579-a0b8-e6fa99ed749d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019e025f-45ab-7579-a0b8-e6fa99ed749d" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e025f-45ab-7579-a0b8-e6fa99ed749d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e025f-45ab-73e3-95e9-50424edfb46b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019e025f-45ab-7579-a0b8-e6fa99ed749d" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e025f-45ab-73e3-95e9-50424edfb46b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wk_OnePointOneTwoFivePercentConvertibleSeniorNotesDue2026Member_019e025f-45ab-7fc9-9bf4-f9ffa8506ac4" xlink:href="wk-20260630.xsd#wk_OnePointOneTwoFivePercentConvertibleSeniorNotesDue2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e025f-45ab-73e3-95e9-50424edfb46b" xlink:to="loc_wk_OnePointOneTwoFivePercentConvertibleSeniorNotesDue2026Member_019e025f-45ab-7fc9-9bf4-f9ffa8506ac4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wk_OnePointOneTwoFivePercentConvertibleSeniorNotesDue2026OverAllotmentOptionMember_019e025f-45ab-7e89-9c2f-708883d85580" xlink:href="wk-20260630.xsd#wk_OnePointOneTwoFivePercentConvertibleSeniorNotesDue2026OverAllotmentOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wk_OnePointOneTwoFivePercentConvertibleSeniorNotesDue2026Member_019e025f-45ab-7fc9-9bf4-f9ffa8506ac4" xlink:to="loc_wk_OnePointOneTwoFivePercentConvertibleSeniorNotesDue2026OverAllotmentOptionMember_019e025f-45ab-7e89-9c2f-708883d85580" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wk_OnePointTwoFivePercentConvertibleSeniorNotesDue2028Member_019e025f-45ab-77c5-ac8d-a5682ac2dc61" xlink:href="wk-20260630.xsd#wk_OnePointTwoFivePercentConvertibleSeniorNotesDue2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e025f-45ab-73e3-95e9-50424edfb46b" xlink:to="loc_wk_OnePointTwoFivePercentConvertibleSeniorNotesDue2028Member_019e025f-45ab-77c5-ac8d-a5682ac2dc61" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wk_OnePointOneTwoFivePercentConvertibleSeniorNotesDue2028OverAllotmentOptionMember_019e025f-45ab-7568-ac4b-f3ca2e9bacbf" xlink:href="wk-20260630.xsd#wk_OnePointOneTwoFivePercentConvertibleSeniorNotesDue2028OverAllotmentOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wk_OnePointTwoFivePercentConvertibleSeniorNotesDue2028Member_019e025f-45ab-77c5-ac8d-a5682ac2dc61" xlink:to="loc_wk_OnePointOneTwoFivePercentConvertibleSeniorNotesDue2028OverAllotmentOptionMember_019e025f-45ab-7568-ac4b-f3ca2e9bacbf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wk_DebtInstrumentConvertibleTermsOfConversionAxis_019e025f-45ab-7286-86e7-202a376ccd15" xlink:href="wk-20260630.xsd#wk_DebtInstrumentConvertibleTermsOfConversionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e025f-45ab-7236-9b50-2d0648a74744" xlink:to="loc_wk_DebtInstrumentConvertibleTermsOfConversionAxis_019e025f-45ab-7286-86e7-202a376ccd15" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_wk_DebtInstrumentConvertibleTermsOfConversionDomain_019e025f-45ab-7286-86e7-202a376ccd15_default" xlink:href="wk-20260630.xsd#wk_DebtInstrumentConvertibleTermsOfConversionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_wk_DebtInstrumentConvertibleTermsOfConversionAxis_019e025f-45ab-7286-86e7-202a376ccd15" xlink:to="loc_wk_DebtInstrumentConvertibleTermsOfConversionDomain_019e025f-45ab-7286-86e7-202a376ccd15_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wk_DebtInstrumentConvertibleTermsOfConversionDomain_019e025f-45ab-72eb-a68b-bacf4d052bab" xlink:href="wk-20260630.xsd#wk_DebtInstrumentConvertibleTermsOfConversionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_wk_DebtInstrumentConvertibleTermsOfConversionAxis_019e025f-45ab-7286-86e7-202a376ccd15" xlink:to="loc_wk_DebtInstrumentConvertibleTermsOfConversionDomain_019e025f-45ab-72eb-a68b-bacf4d052bab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wk_DebtConversionTermsOneMember_019e025f-45ab-773f-966c-6598c4b5effb" xlink:href="wk-20260630.xsd#wk_DebtConversionTermsOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wk_DebtInstrumentConvertibleTermsOfConversionDomain_019e025f-45ab-72eb-a68b-bacf4d052bab" xlink:to="loc_wk_DebtConversionTermsOneMember_019e025f-45ab-773f-966c-6598c4b5effb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wk_DebtConversionTermsTwoMember_019e025f-45ab-7292-8d4b-4ee39717b301" xlink:href="wk-20260630.xsd#wk_DebtConversionTermsTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wk_DebtInstrumentConvertibleTermsOfConversionDomain_019e025f-45ab-72eb-a68b-bacf4d052bab" xlink:to="loc_wk_DebtConversionTermsTwoMember_019e025f-45ab-7292-8d4b-4ee39717b301" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019e025f-45ab-7a19-85b2-707f921688be" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e025f-45ab-7236-9b50-2d0648a74744" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019e025f-45ab-7a19-85b2-707f921688be" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e025f-45ab-7a19-85b2-707f921688be_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e025f-45ab-7a19-85b2-707f921688be" xlink:to="loc_us-gaap_ClassOfStockDomain_019e025f-45ab-7a19-85b2-707f921688be_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e025f-45ab-7957-83fa-6e25ec81f0e5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e025f-45ab-7a19-85b2-707f921688be" xlink:to="loc_us-gaap_ClassOfStockDomain_019e025f-45ab-7957-83fa-6e25ec81f0e5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_019e025f-45ab-78e4-ad7d-bb2aa65c8a3d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e025f-45ab-7957-83fa-6e25ec81f0e5" xlink:to="loc_us-gaap_CommonClassAMember_019e025f-45ab-78e4-ad7d-bb2aa65c8a3d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_019e025f-45ab-7b8a-b624-42e18e4e1040" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e025f-45ab-7da4-889d-98e56eef183e" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_019e025f-45ab-7b8a-b624-42e18e4e1040" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019e025f-45ab-7765-86c6-2d1d64cceb60" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e025f-45ab-7da4-889d-98e56eef183e" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019e025f-45ab-7765-86c6-2d1d64cceb60" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromConvertibleDebt_019e025f-45ab-7740-ba1a-22b992b7265b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromConvertibleDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e025f-45ab-7da4-889d-98e56eef183e" xlink:to="loc_us-gaap_ProceedsFromConvertibleDebt_019e025f-45ab-7740-ba1a-22b992b7265b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_wk_DebtInstrumentFaceAmountMaximumOverAllotmentOption_019e025f-45ab-72de-bc08-279e7beb1926" xlink:href="wk-20260630.xsd#wk_DebtInstrumentFaceAmountMaximumOverAllotmentOption"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e025f-45ab-7da4-889d-98e56eef183e" xlink:to="loc_wk_DebtInstrumentFaceAmountMaximumOverAllotmentOption_019e025f-45ab-72de-bc08-279e7beb1926" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_019e025f-45ab-7cb0-8412-21c0db9d72fd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e025f-45ab-7da4-889d-98e56eef183e" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_019e025f-45ab-7cb0-8412-21c0db9d72fd" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleThresholdTradingDays_019e025f-45ab-7629-8f87-60b72a7dd556" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentConvertibleThresholdTradingDays"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e025f-45ab-7da4-889d-98e56eef183e" xlink:to="loc_us-gaap_DebtInstrumentConvertibleThresholdTradingDays_019e025f-45ab-7629-8f87-60b72a7dd556" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1_019e025f-45ab-7aa0-987f-0169e550736f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e025f-45ab-7da4-889d-98e56eef183e" xlink:to="loc_us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1_019e025f-45ab-7aa0-987f-0169e550736f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger_019e025f-45ab-7960-98ab-8391e1cff511" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e025f-45ab-7da4-889d-98e56eef183e" xlink:to="loc_us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger_019e025f-45ab-7960-98ab-8391e1cff511" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_wk_DebtInstrumentConvertibleThresholdPercentageOfStockTradingPrice_019e025f-45ab-7ebf-8c03-1e089e32f242" xlink:href="wk-20260630.xsd#wk_DebtInstrumentConvertibleThresholdPercentageOfStockTradingPrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e025f-45ab-7da4-889d-98e56eef183e" xlink:to="loc_wk_DebtInstrumentConvertibleThresholdPercentageOfStockTradingPrice_019e025f-45ab-7ebf-8c03-1e089e32f242" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_019e025f-45ac-7283-ab08-ca3869dcc05c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentRedemptionPricePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e025f-45ab-7da4-889d-98e56eef183e" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_019e025f-45ac-7283-ab08-ca3869dcc05c" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_019e025f-45ac-726a-bf85-cf532775fecb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e025f-45ab-7da4-889d-98e56eef183e" xlink:to="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_019e025f-45ac-726a-bf85-cf532775fecb" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_wk_DebtInstrumentRemainingTerm_019e025f-45ac-7319-bb73-12bab37bd5a9" xlink:href="wk-20260630.xsd#wk_DebtInstrumentRemainingTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e025f-45ab-7da4-889d-98e56eef183e" xlink:to="loc_wk_DebtInstrumentRemainingTerm_019e025f-45ac-7319-bb73-12bab37bd5a9" xlink:type="arc" order="11"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workiva.com/role/ConvertibleSeniorNotesNetCarryingAmountofConvertibleDebtDetails" xlink:type="simple" xlink:href="wk-20260630.xsd#ConvertibleSeniorNotesNetCarryingAmountofConvertibleDebtDetails"/>
  <link:definitionLink xlink:role="http://www.workiva.com/role/ConvertibleSeniorNotesNetCarryingAmountofConvertibleDebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019e025f-45ac-7640-a97f-08d87ba12793" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019e025f-45ac-7e8c-8ba3-c0ce427c4c2c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e025f-45ac-7640-a97f-08d87ba12793" xlink:to="loc_us-gaap_DebtInstrumentTable_019e025f-45ac-7e8c-8ba3-c0ce427c4c2c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019e025f-45ac-7946-b0c8-45716d342fac" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e025f-45ac-7e8c-8ba3-c0ce427c4c2c" xlink:to="loc_us-gaap_DebtInstrumentAxis_019e025f-45ac-7946-b0c8-45716d342fac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e025f-45ac-7946-b0c8-45716d342fac_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019e025f-45ac-7946-b0c8-45716d342fac" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e025f-45ac-7946-b0c8-45716d342fac_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e025f-45ac-7c36-a451-e5e798203b39" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019e025f-45ac-7946-b0c8-45716d342fac" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e025f-45ac-7c36-a451-e5e798203b39" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wk_OnePointOneTwoFivePercentConvertibleSeniorNotesDue2026Member_019e025f-45ac-7087-ae4d-814601de3c1a" xlink:href="wk-20260630.xsd#wk_OnePointOneTwoFivePercentConvertibleSeniorNotesDue2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e025f-45ac-7c36-a451-e5e798203b39" xlink:to="loc_wk_OnePointOneTwoFivePercentConvertibleSeniorNotesDue2026Member_019e025f-45ac-7087-ae4d-814601de3c1a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wk_OnePointTwoFivePercentConvertibleSeniorNotesDue2028Member_019e025f-45ac-7776-9635-13672eaa9257" xlink:href="wk-20260630.xsd#wk_OnePointTwoFivePercentConvertibleSeniorNotesDue2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e025f-45ac-7c36-a451-e5e798203b39" xlink:to="loc_wk_OnePointTwoFivePercentConvertibleSeniorNotesDue2028Member_019e025f-45ac-7776-9635-13672eaa9257" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019e025f-45ac-77c3-bc93-dffef4443912" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e025f-45ac-7e8c-8ba3-c0ce427c4c2c" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019e025f-45ac-77c3-bc93-dffef4443912" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019e025f-45ac-77c3-bc93-dffef4443912_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019e025f-45ac-77c3-bc93-dffef4443912" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019e025f-45ac-77c3-bc93-dffef4443912_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019e025f-45ac-75ed-a5f8-b66a4f043a3a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019e025f-45ac-77c3-bc93-dffef4443912" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019e025f-45ac-75ed-a5f8-b66a4f043a3a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtMember_019e025f-45ac-71af-a95d-ce71a6869380" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConvertibleDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019e025f-45ac-75ed-a5f8-b66a4f043a3a" xlink:to="loc_us-gaap_ConvertibleDebtMember_019e025f-45ac-71af-a95d-ce71a6869380" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_019e025f-45ac-70e5-958a-b5c0bb21d9b2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e025f-45ac-7640-a97f-08d87ba12793" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_019e025f-45ac-70e5-958a-b5c0bb21d9b2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_019e025f-45ac-76e1-84ff-bf9b1d263b85" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredFinanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e025f-45ac-7640-a97f-08d87ba12793" xlink:to="loc_us-gaap_DeferredFinanceCostsNet_019e025f-45ac-76e1-84ff-bf9b1d263b85" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_019e025f-45ac-76c9-8771-8a16633bb37a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e025f-45ac-7640-a97f-08d87ba12793" xlink:to="loc_us-gaap_LongTermDebt_019e025f-45ac-76c9-8771-8a16633bb37a" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workiva.com/role/StockBasedCompensationNarrativeDetails" xlink:type="simple" xlink:href="wk-20260630.xsd#StockBasedCompensationNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.workiva.com/role/StockBasedCompensationNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e025f-45ac-7200-840d-32100fb3cffc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e025f-45ac-7947-a1c7-5360875fa0b1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e025f-45ac-7200-840d-32100fb3cffc" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e025f-45ac-7947-a1c7-5360875fa0b1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_019e025f-45ac-7137-9b94-fe97fe8eab21" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e025f-45ac-7947-a1c7-5360875fa0b1" xlink:to="loc_us-gaap_PlanNameAxis_019e025f-45ac-7137-9b94-fe97fe8eab21" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019e025f-45ac-7137-9b94-fe97fe8eab21_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_019e025f-45ac-7137-9b94-fe97fe8eab21" xlink:to="loc_us-gaap_PlanNameDomain_019e025f-45ac-7137-9b94-fe97fe8eab21_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019e025f-45ac-784a-bf69-0c874427b81e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_019e025f-45ac-7137-9b94-fe97fe8eab21" xlink:to="loc_us-gaap_PlanNameDomain_019e025f-45ac-784a-bf69-0c874427b81e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wk_EquityIncentivePlan2014Member_019f70e8-de01-7d9d-ae82-0bc4d51a5646" xlink:href="wk-20260630.xsd#wk_EquityIncentivePlan2014Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019e025f-45ac-784a-bf69-0c874427b81e" xlink:to="loc_wk_EquityIncentivePlan2014Member_019f70e8-de01-7d9d-ae82-0bc4d51a5646" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019f70e9-8763-7ff8-899b-3d63acc634f8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e025f-45ac-7947-a1c7-5360875fa0b1" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019f70e9-8763-7ff8-899b-3d63acc634f8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019f70e9-8763-7ff8-899b-3d63acc634f8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019f70e9-8763-7ff8-899b-3d63acc634f8" xlink:to="loc_us-gaap_ClassOfStockDomain_019f70e9-8763-7ff8-899b-3d63acc634f8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019f70e9-8763-71f1-b043-752a6ade68b4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019f70e9-8763-7ff8-899b-3d63acc634f8" xlink:to="loc_us-gaap_ClassOfStockDomain_019f70e9-8763-71f1-b043-752a6ade68b4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_019f70e9-a9bc-7a55-badd-819bc9da9706" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019f70e9-8763-71f1-b043-752a6ade68b4" xlink:to="loc_us-gaap_CommonClassAMember_019f70e9-a9bc-7a55-badd-819bc9da9706" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized_019f70ea-524f-7c9b-ae5c-de59351b24ab" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e025f-45ac-7200-840d-32100fb3cffc" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized_019f70ea-524f-7c9b-ae5c-de59351b24ab" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_019f70e8-5735-72bd-ba06-d47914730000" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e025f-45ac-7200-840d-32100fb3cffc" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_019f70e8-5735-72bd-ba06-d47914730000" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workiva.com/role/StockBasedCompensationStockBasedCompensationExpenseDetails" xlink:type="simple" xlink:href="wk-20260630.xsd#StockBasedCompensationStockBasedCompensationExpenseDetails"/>
  <link:definitionLink xlink:role="http://www.workiva.com/role/StockBasedCompensationStockBasedCompensationExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019e025f-45ac-750f-8c68-a9fcb19a8ffb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_019e025f-45ac-78a3-8be5-f526927e6ccf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019e025f-45ac-750f-8c68-a9fcb19a8ffb" xlink:to="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_019e025f-45ac-78a3-8be5-f526927e6ccf" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019e025f-45ac-7143-811a-11a16b3a9869" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_019e025f-45ac-78a3-8be5-f526927e6ccf" xlink:to="loc_srt_ProductOrServiceAxis_019e025f-45ac-7143-811a-11a16b3a9869" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019e025f-45ac-7143-811a-11a16b3a9869_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019e025f-45ac-7143-811a-11a16b3a9869" xlink:to="loc_srt_ProductsAndServicesDomain_019e025f-45ac-7143-811a-11a16b3a9869_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019e025f-45ac-7b38-a1e3-76621f6ac8b1" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019e025f-45ac-7143-811a-11a16b3a9869" xlink:to="loc_srt_ProductsAndServicesDomain_019e025f-45ac-7b38-a1e3-76621f6ac8b1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LicenseAndServiceMember_019e025f-45ac-7d1b-bf64-d618101528df" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LicenseAndServiceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e025f-45ac-7b38-a1e3-76621f6ac8b1" xlink:to="loc_us-gaap_LicenseAndServiceMember_019e025f-45ac-7d1b-bf64-d618101528df" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wk_ProfessionalServicesMember_019e025f-45ac-795c-9861-f57f406de01b" xlink:href="wk-20260630.xsd#wk_ProfessionalServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e025f-45ac-7b38-a1e3-76621f6ac8b1" xlink:to="loc_wk_ProfessionalServicesMember_019e025f-45ac-795c-9861-f57f406de01b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfIncomeLocationBalanceAxis_019e025f-45ac-7cf3-82e6-86f3c95d4913" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementOfIncomeLocationBalanceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_019e025f-45ac-78a3-8be5-f526927e6ccf" xlink:to="loc_us-gaap_StatementOfIncomeLocationBalanceAxis_019e025f-45ac-7cf3-82e6-86f3c95d4913" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_019e025f-45ac-7906-a362-7a503e4e7c9f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019e025f-45ac-750f-8c68-a9fcb19a8ffb" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_019e025f-45ac-7906-a362-7a503e4e7c9f" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workiva.com/role/StockBasedCompensationStockBasedCompensationExpenseDetails_1" xlink:type="simple" xlink:href="wk-20260630.xsd#StockBasedCompensationStockBasedCompensationExpenseDetails_1"/>
  <link:definitionLink xlink:role="http://www.workiva.com/role/StockBasedCompensationStockBasedCompensationExpenseDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019e025f-45ac-750f-8c68-a9fcb19a8ffb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_019e025f-45ac-78a3-8be5-f526927e6ccf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019e025f-45ac-750f-8c68-a9fcb19a8ffb" xlink:to="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_019e025f-45ac-78a3-8be5-f526927e6ccf" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019e025f-45ac-7143-811a-11a16b3a9869" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_019e025f-45ac-78a3-8be5-f526927e6ccf" xlink:to="loc_srt_ProductOrServiceAxis_019e025f-45ac-7143-811a-11a16b3a9869" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019e025f-45ac-7143-811a-11a16b3a9869_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019e025f-45ac-7143-811a-11a16b3a9869" xlink:to="loc_srt_ProductsAndServicesDomain_019e025f-45ac-7143-811a-11a16b3a9869_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019e025f-45ac-7b38-a1e3-76621f6ac8b1" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019e025f-45ac-7143-811a-11a16b3a9869" xlink:to="loc_srt_ProductsAndServicesDomain_019e025f-45ac-7b38-a1e3-76621f6ac8b1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LicenseAndServiceMember_019e025f-45ac-7d1b-bf64-d618101528df" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LicenseAndServiceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e025f-45ac-7b38-a1e3-76621f6ac8b1" xlink:to="loc_us-gaap_LicenseAndServiceMember_019e025f-45ac-7d1b-bf64-d618101528df" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wk_ProfessionalServicesMember_019e025f-45ac-795c-9861-f57f406de01b" xlink:href="wk-20260630.xsd#wk_ProfessionalServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e025f-45ac-7b38-a1e3-76621f6ac8b1" xlink:to="loc_wk_ProfessionalServicesMember_019e025f-45ac-795c-9861-f57f406de01b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_019e025f-45ac-7906-a362-7a503e4e7c9f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019e025f-45ac-750f-8c68-a9fcb19a8ffb" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_019e025f-45ac-7906-a362-7a503e4e7c9f" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workiva.com/role/StockBasedCompensationRestrictedStockUnitsandPerformanceRestrictedStockUnitsDetails" xlink:type="simple" xlink:href="wk-20260630.xsd#StockBasedCompensationRestrictedStockUnitsandPerformanceRestrictedStockUnitsDetails"/>
  <link:definitionLink xlink:role="http://www.workiva.com/role/StockBasedCompensationRestrictedStockUnitsandPerformanceRestrictedStockUnitsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e025f-45ac-731b-a372-53f7215694de" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e025f-45ac-7760-bdac-ec90e757e3df" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e025f-45ac-731b-a372-53f7215694de" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e025f-45ac-7760-bdac-ec90e757e3df" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019e025f-45ac-706a-b1df-5ef8826021bb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e025f-45ac-7760-bdac-ec90e757e3df" xlink:to="loc_us-gaap_AwardTypeAxis_019e025f-45ac-706a-b1df-5ef8826021bb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e025f-45ac-706a-b1df-5ef8826021bb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019e025f-45ac-706a-b1df-5ef8826021bb" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e025f-45ac-706a-b1df-5ef8826021bb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e025f-45ac-7ace-84f6-7b370189ab67" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019e025f-45ac-706a-b1df-5ef8826021bb" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e025f-45ac-7ace-84f6-7b370189ab67" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wk_RestrictedStockUnitsAndPerformanceSharesMember_019e025f-45ac-76c1-b66a-5018681beacd" xlink:href="wk-20260630.xsd#wk_RestrictedStockUnitsAndPerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e025f-45ac-7ace-84f6-7b370189ab67" xlink:to="loc_wk_RestrictedStockUnitsAndPerformanceSharesMember_019e025f-45ac-76c1-b66a-5018681beacd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_019e025f-45ac-7c99-97d6-412c6c7fd28c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wk_RestrictedStockUnitsAndPerformanceSharesMember_019e025f-45ac-76c1-b66a-5018681beacd" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_019e025f-45ac-7c99-97d6-412c6c7fd28c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019e025f-45ac-7b0b-8d9f-b57c7eac2d19" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e025f-45ac-731b-a372-53f7215694de" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019e025f-45ac-7b0b-8d9f-b57c7eac2d19" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019e025f-45ac-71ad-a496-41518809122e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019e025f-45ac-7b0b-8d9f-b57c7eac2d19" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019e025f-45ac-71ad-a496-41518809122e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019e025f-45ac-7c61-8a7f-cd37cff32d5b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019e025f-45ac-7b0b-8d9f-b57c7eac2d19" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019e025f-45ac-7c61-8a7f-cd37cff32d5b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_019e025f-45ac-7270-a34e-867bb6a7b246" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019e025f-45ac-7b0b-8d9f-b57c7eac2d19" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_019e025f-45ac-7270-a34e-867bb6a7b246" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_019e025f-45ac-7266-92c9-f82b252244ee" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019e025f-45ac-7b0b-8d9f-b57c7eac2d19" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_019e025f-45ac-7266-92c9-f82b252244ee" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019e025f-45ac-7486-9ba2-b9d1cb0f1f08" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019e025f-45ac-75ee-9303-c317027c1e0b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e025f-45ac-731b-a372-53f7215694de" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019e025f-45ac-75ee-9303-c317027c1e0b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_019e025f-45ac-7300-81c7-4d069124654f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019e025f-45ac-75ee-9303-c317027c1e0b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_019e025f-45ac-7300-81c7-4d069124654f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019e025f-45ac-7a57-948c-9b44a67f3211" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019e025f-45ac-75ee-9303-c317027c1e0b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019e025f-45ac-7a57-948c-9b44a67f3211" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_019e025f-45ac-77fb-92bf-96eb4ff4d3d5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019e025f-45ac-75ee-9303-c317027c1e0b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_019e025f-45ac-77fb-92bf-96eb4ff4d3d5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_019e025f-45ac-78f2-8a49-8e25de7eccf0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019e025f-45ac-75ee-9303-c317027c1e0b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_019e025f-45ac-78f2-8a49-8e25de7eccf0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_019e025f-45ac-7d1c-ab0d-b5bb64c40418" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_wk_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndDeferred_019f4409-613d-7aed-9d63-29ddfdb1d89e" xlink:href="wk-20260630.xsd#wk_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndDeferred"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e025f-45ac-731b-a372-53f7215694de" xlink:to="loc_wk_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndDeferred_019f4409-613d-7aed-9d63-29ddfdb1d89e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_wk_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReleasedFromDeferral_019e025f-45ac-78fa-a9ed-b0f3fc554a66" xlink:href="wk-20260630.xsd#wk_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReleasedFromDeferral"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e025f-45ac-731b-a372-53f7215694de" xlink:to="loc_wk_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReleasedFromDeferral_019e025f-45ac-78fa-a9ed-b0f3fc554a66" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workiva.com/role/StockBasedCompensationEmployeeStockPurchasePlanDetails" xlink:type="simple" xlink:href="wk-20260630.xsd#StockBasedCompensationEmployeeStockPurchasePlanDetails"/>
  <link:definitionLink xlink:role="http://www.workiva.com/role/StockBasedCompensationEmployeeStockPurchasePlanDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e025f-45ac-7d20-808f-89f8d3b86b4b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e025f-45ac-7e47-b6cd-6966cda5418c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e025f-45ac-7d20-808f-89f8d3b86b4b" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e025f-45ac-7e47-b6cd-6966cda5418c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019e025f-45ac-7724-82cc-c5f25bcf720b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e025f-45ac-7e47-b6cd-6966cda5418c" xlink:to="loc_us-gaap_AwardTypeAxis_019e025f-45ac-7724-82cc-c5f25bcf720b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e025f-45ac-7724-82cc-c5f25bcf720b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019e025f-45ac-7724-82cc-c5f25bcf720b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e025f-45ac-7724-82cc-c5f25bcf720b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e025f-45ac-75a1-be69-7d26fb43ede4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019e025f-45ac-7724-82cc-c5f25bcf720b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e025f-45ac-75a1-be69-7d26fb43ede4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockMember_019e025f-45ac-73d5-82f3-a3df13e6c7b4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e025f-45ac-75a1-be69-7d26fb43ede4" xlink:to="loc_us-gaap_EmployeeStockMember_019e025f-45ac-73d5-82f3-a3df13e6c7b4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod_019e025f-45ac-7e47-b55b-48f0813cdc40" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e025f-45ac-7d20-808f-89f8d3b86b4b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod_019e025f-45ac-7e47-b55b-48f0813cdc40" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wk_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriodWeightedAveragePricePerShare_019e025f-45ac-7962-a79e-2f445abdd2ba" xlink:href="wk-20260630.xsd#wk_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriodWeightedAveragePricePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e025f-45ac-7d20-808f-89f8d3b86b4b" xlink:to="loc_wk_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriodWeightedAveragePricePerShare_019e025f-45ac-7962-a79e-2f445abdd2ba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans_019e025f-45ac-7372-9b58-73d697533d78" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e025f-45ac-7d20-808f-89f8d3b86b4b" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans_019e025f-45ac-7372-9b58-73d697533d78" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions_019e025f-45ac-74aa-ab95-13cc71ca4331" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e025f-45ac-7d20-808f-89f8d3b86b4b" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions_019e025f-45ac-74aa-ab95-13cc71ca4331" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_019e025f-45ac-733c-8464-7a733fe2844d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e025f-45ac-7d20-808f-89f8d3b86b4b" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_019e025f-45ac-733c-8464-7a733fe2844d" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workiva.com/role/RevenueRecognitionDetails" xlink:type="simple" xlink:href="wk-20260630.xsd#RevenueRecognitionDetails"/>
  <link:definitionLink xlink:role="http://www.workiva.com/role/RevenueRecognitionDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019e025f-45ac-7264-851c-33d05f79c6bd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019e025f-45ac-70d7-a6ef-56a82d5e6c3b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019e025f-45ac-7264-851c-33d05f79c6bd" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019e025f-45ac-70d7-a6ef-56a82d5e6c3b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_019e025f-45ac-7f23-9ceb-80628fa040df" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019e025f-45ac-70d7-a6ef-56a82d5e6c3b" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_019e025f-45ac-7f23-9ceb-80628fa040df" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_019e025f-45ac-7c69-8b1d-1e5ed33dbe24" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019e025f-45ac-7264-851c-33d05f79c6bd" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_019e025f-45ac-7c69-8b1d-1e5ed33dbe24" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019e025f-45ac-7ae7-a70d-9ccc1ff5e095" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019e025f-45ac-7264-851c-33d05f79c6bd" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019e025f-45ac-7ae7-a70d-9ccc1ff5e095" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workiva.com/role/RevenueRecognitionDetails_1" xlink:type="simple" xlink:href="wk-20260630.xsd#RevenueRecognitionDetails_1"/>
  <link:definitionLink xlink:role="http://www.workiva.com/role/RevenueRecognitionDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019e025f-45ac-7264-851c-33d05f79c6bd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019e025f-45ac-70d7-a6ef-56a82d5e6c3b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019e025f-45ac-7264-851c-33d05f79c6bd" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019e025f-45ac-70d7-a6ef-56a82d5e6c3b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_019e025f-45ac-7c69-8b1d-1e5ed33dbe24" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019e025f-45ac-7264-851c-33d05f79c6bd" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_019e025f-45ac-7c69-8b1d-1e5ed33dbe24" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019e025f-45ac-7ae7-a70d-9ccc1ff5e095" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019e025f-45ac-7264-851c-33d05f79c6bd" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019e025f-45ac-7ae7-a70d-9ccc1ff5e095" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workiva.com/role/IntangibleAssetsandGoodwillIntangibleAssetComponentsDetails" xlink:type="simple" xlink:href="wk-20260630.xsd#IntangibleAssetsandGoodwillIntangibleAssetComponentsDetails"/>
  <link:definitionLink xlink:role="http://www.workiva.com/role/IntangibleAssetsandGoodwillIntangibleAssetComponentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019e025f-45ac-75d4-b19b-3a3711755c49" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019e025f-45ac-7921-8b9a-779f47ef3eb2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019e025f-45ac-75d4-b19b-3a3711755c49" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019e025f-45ac-7921-8b9a-779f47ef3eb2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019e025f-45ac-71f2-890e-4f0e2be773cd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019e025f-45ac-7921-8b9a-779f47ef3eb2" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019e025f-45ac-71f2-890e-4f0e2be773cd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e025f-45ac-71f2-890e-4f0e2be773cd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019e025f-45ac-71f2-890e-4f0e2be773cd" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e025f-45ac-71f2-890e-4f0e2be773cd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e025f-45ac-7c37-a7ef-7d41eaa8d5b2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019e025f-45ac-71f2-890e-4f0e2be773cd" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e025f-45ac-7c37-a7ef-7d41eaa8d5b2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TechnologyBasedIntangibleAssetsMember_019e025f-45ac-7d93-8a9d-4ab6cd06f4e9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TechnologyBasedIntangibleAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e025f-45ac-7c37-a7ef-7d41eaa8d5b2" xlink:to="loc_us-gaap_TechnologyBasedIntangibleAssetsMember_019e025f-45ac-7d93-8a9d-4ab6cd06f4e9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_019e025f-45ac-7e41-b2cc-f5b3a1b40312" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CustomerRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e025f-45ac-7c37-a7ef-7d41eaa8d5b2" xlink:to="loc_us-gaap_CustomerRelationshipsMember_019e025f-45ac-7e41-b2cc-f5b3a1b40312" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_019e025f-45ac-7996-9370-de79582782be" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e025f-45ac-7c37-a7ef-7d41eaa8d5b2" xlink:to="loc_us-gaap_TradeNamesMember_019e025f-45ac-7996-9370-de79582782be" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_wk_PatentsAndPerpetualLicensesMember_019e025f-45ac-7b94-8136-990bfc262eb1" xlink:href="wk-20260630.xsd#wk_PatentsAndPerpetualLicensesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e025f-45ac-7c37-a7ef-7d41eaa8d5b2" xlink:to="loc_wk_PatentsAndPerpetualLicensesMember_019e025f-45ac-7b94-8136-990bfc262eb1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_019e025f-45ac-70ab-81a5-6599d2a6e9f8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019e025f-45ac-75d4-b19b-3a3711755c49" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_019e025f-45ac-70ab-81a5-6599d2a6e9f8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_019e025f-45ac-7f0a-8a16-8c838601c8ba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019e025f-45ac-75d4-b19b-3a3711755c49" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_019e025f-45ac-7f0a-8a16-8c838601c8ba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019e025f-45ac-7b78-89a6-2333ef6d84f1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019e025f-45ac-75d4-b19b-3a3711755c49" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019e025f-45ac-7b78-89a6-2333ef6d84f1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019e025f-45ac-713c-b0c5-3bf5dcdbd11b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019e025f-45ac-75d4-b19b-3a3711755c49" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019e025f-45ac-713c-b0c5-3bf5dcdbd11b" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workiva.com/role/NetIncomeLossPerShareBasicandDilutedIncomeLossPerShareDetails" xlink:type="simple" xlink:href="wk-20260630.xsd#NetIncomeLossPerShareBasicandDilutedIncomeLossPerShareDetails"/>
  <link:definitionLink xlink:role="http://www.workiva.com/role/NetIncomeLossPerShareBasicandDilutedIncomeLossPerShareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockLineItems_019e025f-45ac-71ec-87cc-22f04a265265" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfStockByClassTable_019e025f-45ac-79e8-ae00-21e28e0c5d52" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfStockByClassTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ClassOfStockLineItems_019e025f-45ac-71ec-87cc-22f04a265265" xlink:to="loc_us-gaap_ScheduleOfStockByClassTable_019e025f-45ac-79e8-ae00-21e28e0c5d52" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019e025f-45ac-7308-812b-c5a0e8f04993" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_019e025f-45ac-79e8-ae00-21e28e0c5d52" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019e025f-45ac-7308-812b-c5a0e8f04993" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e025f-45ac-7308-812b-c5a0e8f04993_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e025f-45ac-7308-812b-c5a0e8f04993" xlink:to="loc_us-gaap_ClassOfStockDomain_019e025f-45ac-7308-812b-c5a0e8f04993_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e025f-45ac-7710-9a5c-7abdf8b51279" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e025f-45ac-7308-812b-c5a0e8f04993" xlink:to="loc_us-gaap_ClassOfStockDomain_019e025f-45ac-7710-9a5c-7abdf8b51279" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_019e025f-45ac-7fb8-9ddb-b9be4f0b1261" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e025f-45ac-7710-9a5c-7abdf8b51279" xlink:to="loc_us-gaap_CommonClassAMember_019e025f-45ac-7fb8-9ddb-b9be4f0b1261" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_019e025f-45ac-7741-80df-1483ae634053" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e025f-45ac-7710-9a5c-7abdf8b51279" xlink:to="loc_us-gaap_CommonClassBMember_019e025f-45ac-7741-80df-1483ae634053" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasicAbstract_019e025f-45ac-7901-a68f-cd6682a4dbec" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EarningsPerShareBasicAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019e025f-45ac-71ec-87cc-22f04a265265" xlink:to="loc_us-gaap_EarningsPerShareBasicAbstract_019e025f-45ac-7901-a68f-cd6682a4dbec" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasicAbstract_019e025f-45ac-7281-a86b-2fd2d8aca0c8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasicAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareBasicAbstract_019e025f-45ac-7901-a68f-cd6682a4dbec" xlink:to="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasicAbstract_019e025f-45ac-7281-a86b-2fd2d8aca0c8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_019e025f-45ac-79c4-a09f-1ad93dd4abd1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasicAbstract_019e025f-45ac-7281-a86b-2fd2d8aca0c8" xlink:to="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_019e025f-45ac-79c4-a09f-1ad93dd4abd1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract_019e025f-45ac-77f7-87c0-12ebdeb912d1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareBasicAbstract_019e025f-45ac-7901-a68f-cd6682a4dbec" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract_019e025f-45ac-77f7-87c0-12ebdeb912d1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019e025f-45ac-7067-a445-a4c187779b3c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract_019e025f-45ac-77f7-87c0-12ebdeb912d1" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019e025f-45ac-7067-a445-a4c187779b3c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_019e025f-45ac-7680-a3ba-3c35789a21fe" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareBasicAbstract_019e025f-45ac-7901-a68f-cd6682a4dbec" xlink:to="loc_us-gaap_EarningsPerShareBasic_019e025f-45ac-7680-a3ba-3c35789a21fe" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDilutedAbstract_019e025f-45ac-7310-9b6c-5b26ba445988" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EarningsPerShareDilutedAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019e025f-45ac-71ec-87cc-22f04a265265" xlink:to="loc_us-gaap_EarningsPerShareDilutedAbstract_019e025f-45ac-7310-9b6c-5b26ba445988" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDilutedAbstract_019e025f-45ac-77cc-9ea9-80f38b896084" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersDilutedAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareDilutedAbstract_019e025f-45ac-7310-9b6c-5b26ba445988" xlink:to="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDilutedAbstract_019e025f-45ac-77cc-9ea9-80f38b896084" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_019e025f-45ac-712b-b79e-c2c5b5d76fdd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_019e025f-45ac-7d1e-ad68-e9b14d956363" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDilutedAbstract_019e025f-45ac-77cc-9ea9-80f38b896084" xlink:to="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_019e025f-45ac-7d1e-ad68-e9b14d956363" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_019e025f-45ac-7237-9432-ac3ec49a4d20" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareDilutedAbstract_019e025f-45ac-7310-9b6c-5b26ba445988" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_019e025f-45ac-7237-9432-ac3ec49a4d20" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019e025f-45ac-7add-9e91-358d87d31285" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract_019e025f-45ac-7b27-b0b9-7134c172e725" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_019e025f-45ac-7237-9432-ac3ec49a4d20" xlink:to="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract_019e025f-45ac-7b27-b0b9-7134c172e725" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_019e025f-45ac-720c-8e6c-cbf4122941df" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract_019e025f-45ac-7b27-b0b9-7134c172e725" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_019e025f-45ac-720c-8e6c-cbf4122941df" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019e025f-45ac-7793-93c8-395fc5a4f5a7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_019e025f-45ac-7237-9432-ac3ec49a4d20" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019e025f-45ac-7793-93c8-395fc5a4f5a7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_019e025f-45ac-77b8-bfa9-1f4a8d0f0919" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareDilutedAbstract_019e025f-45ac-7310-9b6c-5b26ba445988" xlink:to="loc_us-gaap_EarningsPerShareDiluted_019e025f-45ac-77b8-bfa9-1f4a8d0f0919" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workiva.com/role/NetIncomeLossPerShareAntidilutiveSecuritiesExcludedfromComputationofEarningsPerShareDetails" xlink:type="simple" xlink:href="wk-20260630.xsd#NetIncomeLossPerShareAntidilutiveSecuritiesExcludedfromComputationofEarningsPerShareDetails"/>
  <link:definitionLink xlink:role="http://www.workiva.com/role/NetIncomeLossPerShareAntidilutiveSecuritiesExcludedfromComputationofEarningsPerShareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019e025f-45ac-73ca-9a4b-7419ed6d4159" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019e025f-45ac-73bb-bea8-b09d3384f408" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019e025f-45ac-73ca-9a4b-7419ed6d4159" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019e025f-45ac-73bb-bea8-b09d3384f408" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019e025f-45ac-75ee-994c-1ff2a382fec8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019e025f-45ac-73bb-bea8-b09d3384f408" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019e025f-45ac-75ee-994c-1ff2a382fec8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019e025f-45ac-75ee-994c-1ff2a382fec8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019e025f-45ac-75ee-994c-1ff2a382fec8" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019e025f-45ac-75ee-994c-1ff2a382fec8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019e025f-45ac-7add-998e-d6c7f8a07caa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019e025f-45ac-75ee-994c-1ff2a382fec8" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019e025f-45ac-7add-998e-d6c7f8a07caa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_019e025f-45ac-73ad-a0fb-36fbb225b0cb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019e025f-45ac-7add-998e-d6c7f8a07caa" xlink:to="loc_us-gaap_EmployeeStockOptionMember_019e025f-45ac-73ad-a0fb-36fbb225b0cb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wk_RestrictedStockUnitsAndPerformanceSharesMember_019e025f-45ac-7ee8-bcf5-ab39ebc1f536" xlink:href="wk-20260630.xsd#wk_RestrictedStockUnitsAndPerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019e025f-45ac-7add-998e-d6c7f8a07caa" xlink:to="loc_wk_RestrictedStockUnitsAndPerformanceSharesMember_019e025f-45ac-7ee8-bcf5-ab39ebc1f536" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockMember_019e025f-45ac-7410-a4fe-532eeea0193f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019e025f-45ac-7add-998e-d6c7f8a07caa" xlink:to="loc_us-gaap_EmployeeStockMember_019e025f-45ac-7410-a4fe-532eeea0193f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtSecuritiesMember_019e025f-45ac-7ae1-b9d3-db10475e4ff2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConvertibleDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019e025f-45ac-7add-998e-d6c7f8a07caa" xlink:to="loc_us-gaap_ConvertibleDebtSecuritiesMember_019e025f-45ac-7ae1-b9d3-db10475e4ff2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_019e025f-45ac-7de4-b098-32ba10cb2e79" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019e025f-45ac-73ca-9a4b-7419ed6d4159" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_019e025f-45ac-7de4-b098-32ba10cb2e79" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workiva.com/role/GeographicInformationRevenueandLonglivedAssetsDetails" xlink:type="simple" xlink:href="wk-20260630.xsd#GeographicInformationRevenueandLonglivedAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.workiva.com/role/GeographicInformationRevenueandLonglivedAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_019e025f-45ac-75a3-8322-1d966350d2fb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_019e025f-45ac-7f6d-b8cf-3afdd5b5e5dd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_019e025f-45ac-75a3-8322-1d966350d2fb" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_019e025f-45ac-7f6d-b8cf-3afdd5b5e5dd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_019e025f-45ac-7a42-8545-648282785ab8" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_019e025f-45ac-7f6d-b8cf-3afdd5b5e5dd" xlink:to="loc_srt_StatementGeographicalAxis_019e025f-45ac-7a42-8545-648282785ab8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019e025f-45ac-7a42-8545-648282785ab8_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_019e025f-45ac-7a42-8545-648282785ab8" xlink:to="loc_srt_SegmentGeographicalDomain_019e025f-45ac-7a42-8545-648282785ab8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019e025f-45ac-7e59-9cb1-19b7f29b6a34" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_019e025f-45ac-7a42-8545-648282785ab8" xlink:to="loc_srt_SegmentGeographicalDomain_019e025f-45ac-7e59-9cb1-19b7f29b6a34" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_019e025f-45ac-7df6-974f-c9d18f4e8bd0" xlink:href="https://xbrl.sec.gov/country/2026/country-2026.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019e025f-45ac-7e59-9cb1-19b7f29b6a34" xlink:to="loc_country_US_019e025f-45ac-7df6-974f-c9d18f4e8bd0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_GB_019e025f-45ac-7fe2-aa42-18f92e158c59" xlink:href="https://xbrl.sec.gov/country/2026/country-2026.xsd#country_GB"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019e025f-45ac-7e59-9cb1-19b7f29b6a34" xlink:to="loc_country_GB_019e025f-45ac-7fe2-aa42-18f92e158c59" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonUsMember_019e025f-45ac-775b-8a4d-9295ec8a4e0a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NonUsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019e025f-45ac-7e59-9cb1-19b7f29b6a34" xlink:to="loc_us-gaap_NonUsMember_019e025f-45ac-775b-8a4d-9295ec8a4e0a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_wk_OtherCountriesExcludingUnitedStatesAndUnitedKingdomMember_019e025f-45ac-77cf-b7f8-30867e097c21" xlink:href="wk-20260630.xsd#wk_OtherCountriesExcludingUnitedStatesAndUnitedKingdomMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019e025f-45ac-7e59-9cb1-19b7f29b6a34" xlink:to="loc_wk_OtherCountriesExcludingUnitedStatesAndUnitedKingdomMember_019e025f-45ac-77cf-b7f8-30867e097c21" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e025f-45ac-720d-b415-49da62392621" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_019e025f-45ac-75a3-8322-1d966350d2fb" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e025f-45ac-720d-b415-49da62392621" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncurrentAssets_019e025f-45ac-7f1d-8e47-674b632172a8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NoncurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_019e025f-45ac-75a3-8322-1d966350d2fb" xlink:to="loc_us-gaap_NoncurrentAssets_019e025f-45ac-7f1d-8e47-674b632172a8" xlink:type="arc" order="1"/>
  </link:definitionLink>
</link:linkbase>
