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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019e89fe-1991-7b45-9a97-9807a504c5de,g:220b9c0f-0783-434b-8c1b-3f1c6034a4e0-->
<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.workday.com/role/DocumentandEntityInformation" xlink:type="simple" xlink:href="wday-20260731.xsd#DocumentandEntityInformation"/>
  <link:definitionLink xlink:role="http://www.workday.com/role/DocumentandEntityInformation" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInformationLineItems_019e89fe-1b4a-7b4c-89a8-474e516f326c" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitiesTable_019e89fe-1b4a-793a-abd0-321e1b889cc3" 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_019e89fe-1b4a-7b4c-89a8-474e516f326c" xlink:to="loc_dei_EntitiesTable_019e89fe-1b4a-793a-abd0-321e1b889cc3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019e89fe-1b4a-771a-9981-e9b3729e9272" 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_019e89fe-1b4a-793a-abd0-321e1b889cc3" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019e89fe-1b4a-771a-9981-e9b3729e9272" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e89fe-1b4a-771a-9981-e9b3729e9272_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_019e89fe-1b4a-771a-9981-e9b3729e9272" xlink:to="loc_us-gaap_ClassOfStockDomain_019e89fe-1b4a-771a-9981-e9b3729e9272_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e89fe-1b4a-7c2b-98eb-e16d88fc8145" 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_019e89fe-1b4a-771a-9981-e9b3729e9272" xlink:to="loc_us-gaap_ClassOfStockDomain_019e89fe-1b4a-7c2b-98eb-e16d88fc8145" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_019e89fe-1b4a-7c47-b72f-0d0d8c5ab83d" 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_019e89fe-1b4a-7c2b-98eb-e16d88fc8145" xlink:to="loc_us-gaap_CommonClassAMember_019e89fe-1b4a-7c47-b72f-0d0d8c5ab83d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_019e89fe-1b4a-7a63-9077-754a8d3ca7b2" 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_019e89fe-1b4a-7c2b-98eb-e16d88fc8145" xlink:to="loc_us-gaap_CommonClassBMember_019e89fe-1b4a-7a63-9077-754a8d3ca7b2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_019e89fe-1b4a-7972-8226-f0994d03bba3" 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_019e89fe-1b4a-7b4c-89a8-474e516f326c" xlink:to="loc_dei_DocumentType_019e89fe-1b4a-7972-8226-f0994d03bba3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentQuarterlyReport_019e89fe-1b4a-7620-9b6b-b55d0cb2761e" 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_019e89fe-1b4a-7b4c-89a8-474e516f326c" xlink:to="loc_dei_DocumentQuarterlyReport_019e89fe-1b4a-7620-9b6b-b55d0cb2761e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_019e89fe-1b4a-7816-9eee-c85b807015a2" 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_019e89fe-1b4a-7b4c-89a8-474e516f326c" xlink:to="loc_dei_DocumentPeriodEndDate_019e89fe-1b4a-7816-9eee-c85b807015a2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentTransitionReport_019e89fe-1b4a-76e6-8ac6-bfe70ed09c48" 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_019e89fe-1b4a-7b4c-89a8-474e516f326c" xlink:to="loc_dei_DocumentTransitionReport_019e89fe-1b4a-76e6-8ac6-bfe70ed09c48" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_019e89fe-1b4a-7825-a9c6-195370b922ff" 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_019e89fe-1b4a-7b4c-89a8-474e516f326c" xlink:to="loc_dei_EntityFileNumber_019e89fe-1b4a-7825-a9c6-195370b922ff" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_019e89fe-1b4a-70e6-adf4-19fc84d1bb4d" 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_019e89fe-1b4a-7b4c-89a8-474e516f326c" xlink:to="loc_dei_EntityRegistrantName_019e89fe-1b4a-70e6-adf4-19fc84d1bb4d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_019e89fe-1b4a-73be-b096-3908bab946ad" 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_019e89fe-1b4a-7b4c-89a8-474e516f326c" xlink:to="loc_dei_EntityIncorporationStateCountryCode_019e89fe-1b4a-73be-b096-3908bab946ad" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_019e89fe-1b4a-7a13-a827-986bbbe3cb57" 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_019e89fe-1b4a-7b4c-89a8-474e516f326c" xlink:to="loc_dei_EntityTaxIdentificationNumber_019e89fe-1b4a-7a13-a827-986bbbe3cb57" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_019e89fe-1b4a-7cd0-8700-11edfbe0eca8" 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_019e89fe-1b4a-7b4c-89a8-474e516f326c" xlink:to="loc_dei_EntityAddressAddressLine1_019e89fe-1b4a-7cd0-8700-11edfbe0eca8" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_019e89fe-1b4a-70f8-864f-589bf69d3e0c" 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_019e89fe-1b4a-7b4c-89a8-474e516f326c" xlink:to="loc_dei_EntityAddressCityOrTown_019e89fe-1b4a-70f8-864f-589bf69d3e0c" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_019e89fe-1b4a-7beb-824b-68c649d7fe6d" 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_019e89fe-1b4a-7b4c-89a8-474e516f326c" xlink:to="loc_dei_EntityAddressStateOrProvince_019e89fe-1b4a-7beb-824b-68c649d7fe6d" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_019e89fe-1b4a-70cc-abce-348334c2812e" 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_019e89fe-1b4a-7b4c-89a8-474e516f326c" xlink:to="loc_dei_EntityAddressPostalZipCode_019e89fe-1b4a-70cc-abce-348334c2812e" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_019e89fe-1b4a-7191-98a3-ae74a2425233" 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_019e89fe-1b4a-7b4c-89a8-474e516f326c" xlink:to="loc_dei_CityAreaCode_019e89fe-1b4a-7191-98a3-ae74a2425233" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_019e89fe-1b4a-74c0-a1bd-1d29d18d8607" 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_019e89fe-1b4a-7b4c-89a8-474e516f326c" xlink:to="loc_dei_LocalPhoneNumber_019e89fe-1b4a-74c0-a1bd-1d29d18d8607" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_019e89fe-1b4a-75fc-8075-c93ecbeb0522" 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_019e89fe-1b4a-7b4c-89a8-474e516f326c" xlink:to="loc_dei_Security12bTitle_019e89fe-1b4a-75fc-8075-c93ecbeb0522" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_019e89fe-1b4a-71b5-90ab-e7e5dd6dfda1" 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_019e89fe-1b4a-7b4c-89a8-474e516f326c" xlink:to="loc_dei_TradingSymbol_019e89fe-1b4a-71b5-90ab-e7e5dd6dfda1" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_019e89fe-1b4a-7377-af66-61a03116fc3a" 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_019e89fe-1b4a-7b4c-89a8-474e516f326c" xlink:to="loc_dei_SecurityExchangeName_019e89fe-1b4a-7377-af66-61a03116fc3a" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCurrentReportingStatus_019e89fe-1b4a-78f4-a1c7-397570f51ed2" 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_019e89fe-1b4a-7b4c-89a8-474e516f326c" xlink:to="loc_dei_EntityCurrentReportingStatus_019e89fe-1b4a-78f4-a1c7-397570f51ed2" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInteractiveDataCurrent_019e89fe-1b4a-79fa-a0c5-3cf24145434f" 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_019e89fe-1b4a-7b4c-89a8-474e516f326c" xlink:to="loc_dei_EntityInteractiveDataCurrent_019e89fe-1b4a-79fa-a0c5-3cf24145434f" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFilerCategory_019e89fe-1b4a-7d0b-bbe3-fe2b966923e3" 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_019e89fe-1b4a-7b4c-89a8-474e516f326c" xlink:to="loc_dei_EntityFilerCategory_019e89fe-1b4a-7d0b-bbe3-fe2b966923e3" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitySmallBusiness_019e89fe-1b4a-7bd6-a848-39ef92d25cd7" 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_019e89fe-1b4a-7b4c-89a8-474e516f326c" xlink:to="loc_dei_EntitySmallBusiness_019e89fe-1b4a-7bd6-a848-39ef92d25cd7" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_019e89fe-1b4a-795e-9e6b-e98974fbe316" 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_019e89fe-1b4a-7b4c-89a8-474e516f326c" xlink:to="loc_dei_EntityEmergingGrowthCompany_019e89fe-1b4a-795e-9e6b-e98974fbe316" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany_019e89fe-1b4a-780e-8a83-65daaf315f4c" 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_019e89fe-1b4a-7b4c-89a8-474e516f326c" xlink:to="loc_dei_EntityShellCompany_019e89fe-1b4a-780e-8a83-65daaf315f4c" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_019e89fe-1b4a-7fc0-8ff4-07e8b61e1641" 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_019e89fe-1b4a-7b4c-89a8-474e516f326c" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_019e89fe-1b4a-7fc0-8ff4-07e8b61e1641" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_019e89fe-1b4a-7453-afdc-f08d936a77d4" 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_019e89fe-1b4a-7b4c-89a8-474e516f326c" xlink:to="loc_dei_EntityCentralIndexKey_019e89fe-1b4a-7453-afdc-f08d936a77d4" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate_019e89fe-1b4a-7758-bde7-46e5fe691ab5" 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_019e89fe-1b4a-7b4c-89a8-474e516f326c" xlink:to="loc_dei_CurrentFiscalYearEndDate_019e89fe-1b4a-7758-bde7-46e5fe691ab5" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalYearFocus_019e89fe-1b4a-70ad-b751-c8bb5f195c94" 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_019e89fe-1b4a-7b4c-89a8-474e516f326c" xlink:to="loc_dei_DocumentFiscalYearFocus_019e89fe-1b4a-70ad-b751-c8bb5f195c94" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalPeriodFocus_019e89fe-1b4a-75a1-b7ca-99124c522585" 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_019e89fe-1b4a-7b4c-89a8-474e516f326c" xlink:to="loc_dei_DocumentFiscalPeriodFocus_019e89fe-1b4a-75a1-b7ca-99124c522585" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_019e89fe-1b4a-7419-986f-d8499cb1fb36" 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_019e89fe-1b4a-7b4c-89a8-474e516f326c" xlink:to="loc_dei_AmendmentFlag_019e89fe-1b4a-7419-986f-d8499cb1fb36" xlink:type="arc" order="28"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workday.com/role/CondensedConsolidatedStatementsofOperations" xlink:type="simple" xlink:href="wday-20260731.xsd#CondensedConsolidatedStatementsofOperations"/>
  <link:definitionLink xlink:role="http://www.workday.com/role/CondensedConsolidatedStatementsofOperations" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019e89fe-1b4a-73a0-947d-52bd85742db4" 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_019e89fe-1b4a-765e-9741-e9b95b9eee59" 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_019e89fe-1b4a-73a0-947d-52bd85742db4" xlink:to="loc_us-gaap_StatementTable_019e89fe-1b4a-765e-9741-e9b95b9eee59" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019e89fe-1b4a-747b-869c-f308484ddf8a" 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_019e89fe-1b4a-765e-9741-e9b95b9eee59" xlink:to="loc_srt_ProductOrServiceAxis_019e89fe-1b4a-747b-869c-f308484ddf8a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019e89fe-1b4a-747b-869c-f308484ddf8a_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_019e89fe-1b4a-747b-869c-f308484ddf8a" xlink:to="loc_srt_ProductsAndServicesDomain_019e89fe-1b4a-747b-869c-f308484ddf8a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019e89fe-1b4a-7ce8-8b7f-4b3cc9b92c56" 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_019e89fe-1b4a-747b-869c-f308484ddf8a" xlink:to="loc_srt_ProductsAndServicesDomain_019e89fe-1b4a-7ce8-8b7f-4b3cc9b92c56" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_SubscriptionServicesMember_019e89fe-1b4a-7bb4-b35e-8bc4e60669a3" xlink:href="wday-20260731.xsd#wday_SubscriptionServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e89fe-1b4a-7ce8-8b7f-4b3cc9b92c56" xlink:to="loc_wday_SubscriptionServicesMember_019e89fe-1b4a-7bb4-b35e-8bc4e60669a3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_ProfessionalServicesMember_019e89fe-1b4a-7111-bd53-49bc0dae72b7" xlink:href="wday-20260731.xsd#wday_ProfessionalServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e89fe-1b4a-7ce8-8b7f-4b3cc9b92c56" xlink:to="loc_wday_ProfessionalServicesMember_019e89fe-1b4a-7111-bd53-49bc0dae72b7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesAbstract_019e89fe-1b4a-7689-a01a-df0cc7401d5c" 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_019e89fe-1b4a-73a0-947d-52bd85742db4" xlink:to="loc_us-gaap_RevenuesAbstract_019e89fe-1b4a-7689-a01a-df0cc7401d5c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e89fe-1b4a-7c63-a3fc-72854682cfdf" 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_019e89fe-1b4a-7689-a01a-df0cc7401d5c" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e89fe-1b4a-7c63-a3fc-72854682cfdf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfRevenueAbstract_019e89fe-1b4a-728f-baeb-35e392f6d579" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostOfRevenueAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e89fe-1b4a-73a0-947d-52bd85742db4" xlink:to="loc_us-gaap_CostOfRevenueAbstract_019e89fe-1b4a-728f-baeb-35e392f6d579" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_019e89fe-1b4a-74cd-aef1-16dd094f6d88" 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_CostOfRevenueAbstract_019e89fe-1b4a-728f-baeb-35e392f6d579" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_019e89fe-1b4a-74cd-aef1-16dd094f6d88" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_019e89fe-1b4a-7ee8-bd48-5df93abc9250" 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_CostOfRevenueAbstract_019e89fe-1b4a-728f-baeb-35e392f6d579" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_019e89fe-1b4a-7ee8-bd48-5df93abc9250" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingAndMarketingExpense_019e89fe-1b4a-7268-9e5b-f26b0347e6cd" 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_CostOfRevenueAbstract_019e89fe-1b4a-728f-baeb-35e392f6d579" xlink:to="loc_us-gaap_SellingAndMarketingExpense_019e89fe-1b4a-7268-9e5b-f26b0347e6cd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_019e89fe-1b4a-796a-8647-6e5d543584f7" 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_CostOfRevenueAbstract_019e89fe-1b4a-728f-baeb-35e392f6d579" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_019e89fe-1b4a-796a-8647-6e5d543584f7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_019e89fe-1b4a-76b5-8ae4-3036c31d1b02" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestructuringCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfRevenueAbstract_019e89fe-1b4a-728f-baeb-35e392f6d579" xlink:to="loc_us-gaap_RestructuringCharges_019e89fe-1b4a-76b5-8ae4-3036c31d1b02" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_019e89fe-1b4a-73e6-8bc5-0c2b584d1795" 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_CostOfRevenueAbstract_019e89fe-1b4a-728f-baeb-35e392f6d579" xlink:to="loc_us-gaap_OperatingExpenses_019e89fe-1b4a-73e6-8bc5-0c2b584d1795" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_019e89fe-1b4a-72b6-8e51-f215bad7e36c" 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_019e89fe-1b4a-73a0-947d-52bd85742db4" xlink:to="loc_us-gaap_OperatingIncomeLoss_019e89fe-1b4a-72b6-8e51-f215bad7e36c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_019e89fe-1b4a-7751-8e48-6b9f95114ac7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e89fe-1b4a-73a0-947d-52bd85742db4" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_019e89fe-1b4a-7751-8e48-6b9f95114ac7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019e89fe-1b4a-7df2-9107-d1bae3cc83f0" 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_019e89fe-1b4a-73a0-947d-52bd85742db4" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019e89fe-1b4a-7df2-9107-d1bae3cc83f0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019e89fe-1b4a-7fce-b518-61bfd0547f40" 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_019e89fe-1b4a-73a0-947d-52bd85742db4" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019e89fe-1b4a-7fce-b518-61bfd0547f40" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019e89fe-1b4a-7d32-b2bc-1bc2456caf0e" 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_019e89fe-1b4a-73a0-947d-52bd85742db4" xlink:to="loc_us-gaap_NetIncomeLoss_019e89fe-1b4a-7d32-b2bc-1bc2456caf0e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_019e89fe-1b4a-745d-b1f3-32341aef328f" 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_StatementLineItems_019e89fe-1b4a-73a0-947d-52bd85742db4" xlink:to="loc_us-gaap_EarningsPerShareBasic_019e89fe-1b4a-745d-b1f3-32341aef328f" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_019e89fe-1b4a-7de2-9755-f60422c5bb64" 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_StatementLineItems_019e89fe-1b4a-73a0-947d-52bd85742db4" xlink:to="loc_us-gaap_EarningsPerShareDiluted_019e89fe-1b4a-7de2-9755-f60422c5bb64" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019e89fe-1b4a-7c68-9a0d-251e3ff7529c" 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_StatementLineItems_019e89fe-1b4a-73a0-947d-52bd85742db4" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019e89fe-1b4a-7c68-9a0d-251e3ff7529c" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019e89fe-1b4a-729f-b247-646299eb3c86" 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_StatementLineItems_019e89fe-1b4a-73a0-947d-52bd85742db4" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019e89fe-1b4a-729f-b247-646299eb3c86" xlink:type="arc" order="10"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workday.com/role/CondensedConsolidatedStatementsofOperationsParenthetical" xlink:type="simple" xlink:href="wday-20260731.xsd#CondensedConsolidatedStatementsofOperationsParenthetical"/>
  <link:definitionLink xlink:role="http://www.workday.com/role/CondensedConsolidatedStatementsofOperationsParenthetical" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019e89fe-1b4a-781c-bec3-f9a6201bbdc5" 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_019e89fe-1b4a-751f-8b75-472ab0a12919" 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_019e89fe-1b4a-781c-bec3-f9a6201bbdc5" xlink:to="loc_us-gaap_StatementTable_019e89fe-1b4a-751f-8b75-472ab0a12919" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019f4268-7bf9-79ac-a4c1-d954a4aef175" 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_019e89fe-1b4a-751f-8b75-472ab0a12919" xlink:to="loc_srt_ProductOrServiceAxis_019f4268-7bf9-79ac-a4c1-d954a4aef175" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019f4268-7bf9-79ac-a4c1-d954a4aef175_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_019f4268-7bf9-79ac-a4c1-d954a4aef175" xlink:to="loc_srt_ProductsAndServicesDomain_019f4268-7bf9-79ac-a4c1-d954a4aef175_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019f4268-7bf9-71e8-8516-edd9c5aef30a" 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_019f4268-7bf9-79ac-a4c1-d954a4aef175" xlink:to="loc_srt_ProductsAndServicesDomain_019f4268-7bf9-71e8-8516-edd9c5aef30a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_SubscriptionServicesMember_019f4268-7bf9-78b3-861c-b5542cfa5812" xlink:href="wday-20260731.xsd#wday_SubscriptionServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019f4268-7bf9-71e8-8516-edd9c5aef30a" xlink:to="loc_wday_SubscriptionServicesMember_019f4268-7bf9-78b3-861c-b5542cfa5812" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_ProfessionalServicesMember_019f4268-7bf9-73c0-8098-5df085fbb316" xlink:href="wday-20260731.xsd#wday_ProfessionalServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019f4268-7bf9-71e8-8516-edd9c5aef30a" xlink:to="loc_wday_ProfessionalServicesMember_019f4268-7bf9-73c0-8098-5df085fbb316" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfIncomeLocationBalanceAxis_019e89fe-1b4a-70af-8414-9299d9df18c5" 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_StatementTable_019e89fe-1b4a-751f-8b75-472ab0a12919" xlink:to="loc_us-gaap_StatementOfIncomeLocationBalanceAxis_019e89fe-1b4a-70af-8414-9299d9df18c5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_019e89fe-1b4a-7336-9fbf-400cd101d888" 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_StatementLineItems_019e89fe-1b4a-781c-bec3-f9a6201bbdc5" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_019e89fe-1b4a-7336-9fbf-400cd101d888" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workday.com/role/CondensedConsolidatedStatementsofOperationsParenthetical_1" xlink:type="simple" xlink:href="wday-20260731.xsd#CondensedConsolidatedStatementsofOperationsParenthetical_1"/>
  <link:definitionLink xlink:role="http://www.workday.com/role/CondensedConsolidatedStatementsofOperationsParenthetical_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019e89fe-1b4a-781c-bec3-f9a6201bbdc5" 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_019e89fe-1b4a-751f-8b75-472ab0a12919" 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_019e89fe-1b4a-781c-bec3-f9a6201bbdc5" xlink:to="loc_us-gaap_StatementTable_019e89fe-1b4a-751f-8b75-472ab0a12919" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019f4268-7bf9-79ac-a4c1-d954a4aef175" 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_019e89fe-1b4a-751f-8b75-472ab0a12919" xlink:to="loc_srt_ProductOrServiceAxis_019f4268-7bf9-79ac-a4c1-d954a4aef175" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019f4268-7bf9-79ac-a4c1-d954a4aef175_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_019f4268-7bf9-79ac-a4c1-d954a4aef175" xlink:to="loc_srt_ProductsAndServicesDomain_019f4268-7bf9-79ac-a4c1-d954a4aef175_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019f4268-7bf9-71e8-8516-edd9c5aef30a" 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_019f4268-7bf9-79ac-a4c1-d954a4aef175" xlink:to="loc_srt_ProductsAndServicesDomain_019f4268-7bf9-71e8-8516-edd9c5aef30a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_SubscriptionServicesMember_019f4268-7bf9-78b3-861c-b5542cfa5812" xlink:href="wday-20260731.xsd#wday_SubscriptionServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019f4268-7bf9-71e8-8516-edd9c5aef30a" xlink:to="loc_wday_SubscriptionServicesMember_019f4268-7bf9-78b3-861c-b5542cfa5812" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_ProfessionalServicesMember_019f4268-7bf9-73c0-8098-5df085fbb316" xlink:href="wday-20260731.xsd#wday_ProfessionalServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019f4268-7bf9-71e8-8516-edd9c5aef30a" xlink:to="loc_wday_ProfessionalServicesMember_019f4268-7bf9-73c0-8098-5df085fbb316" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_019e89fe-1b4a-7336-9fbf-400cd101d888" 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_StatementLineItems_019e89fe-1b4a-781c-bec3-f9a6201bbdc5" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_019e89fe-1b4a-7336-9fbf-400cd101d888" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workday.com/role/CondensedConsolidatedStatementsofStockholdersEquity" xlink:type="simple" xlink:href="wday-20260731.xsd#CondensedConsolidatedStatementsofStockholdersEquity"/>
  <link:definitionLink xlink:role="http://www.workday.com/role/CondensedConsolidatedStatementsofStockholdersEquity" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019e89fe-1b4a-7164-a9d2-22e4c09c4b41" 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_019e89fe-1b4a-76ad-9382-5144168e33cf" 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_019e89fe-1b4a-7164-a9d2-22e4c09c4b41" xlink:to="loc_us-gaap_StatementTable_019e89fe-1b4a-76ad-9382-5144168e33cf" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019e89fe-1b4a-7368-8133-1d2425aa8cf7" 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_019e89fe-1b4a-76ad-9382-5144168e33cf" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019e89fe-1b4a-7368-8133-1d2425aa8cf7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019e89fe-1b4a-7368-8133-1d2425aa8cf7_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_019e89fe-1b4a-7368-8133-1d2425aa8cf7" xlink:to="loc_us-gaap_EquityComponentDomain_019e89fe-1b4a-7368-8133-1d2425aa8cf7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019e89fe-1b4a-75e0-b3c0-fffbe836247f" 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_019e89fe-1b4a-7368-8133-1d2425aa8cf7" xlink:to="loc_us-gaap_EquityComponentDomain_019e89fe-1b4a-75e0-b3c0-fffbe836247f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019e89fe-1b4a-77b8-a77c-b9d229affa2f" 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_019e89fe-1b4a-75e0-b3c0-fffbe836247f" xlink:to="loc_us-gaap_CommonStockMember_019e89fe-1b4a-77b8-a77c-b9d229affa2f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_019e89fe-1b4a-7398-8a17-1e2b1fc87a1b" 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_019e89fe-1b4a-75e0-b3c0-fffbe836247f" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_019e89fe-1b4a-7398-8a17-1e2b1fc87a1b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonMember_019e89fe-1b4a-748a-b400-a7b681acb199" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TreasuryStockCommonMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e89fe-1b4a-75e0-b3c0-fffbe836247f" xlink:to="loc_us-gaap_TreasuryStockCommonMember_019e89fe-1b4a-748a-b400-a7b681acb199" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019e89fe-1b4a-7c69-b41d-9addc663a38b" 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_019e89fe-1b4a-75e0-b3c0-fffbe836247f" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019e89fe-1b4a-7c69-b41d-9addc663a38b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_019e89fe-1b4a-798a-9bfe-7eb540b4211e" 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_019e89fe-1b4a-75e0-b3c0-fffbe836247f" xlink:to="loc_us-gaap_RetainedEarningsMember_019e89fe-1b4a-798a-9bfe-7eb540b4211e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e89fe-1b4a-7045-8ee6-ac3efc7541e6" 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_019e89fe-1b4a-7164-a9d2-22e4c09c4b41" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e89fe-1b4a-7045-8ee6-ac3efc7541e6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_019e89fe-1b4a-71c7-86ac-c80c59fc0d1d" 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_IncreaseDecreaseInStockholdersEquityRollForward_019e89fe-1b4a-7045-8ee6-ac3efc7541e6" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_019e89fe-1b4a-71c7-86ac-c80c59fc0d1d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019e89fe-1b4a-75bd-92a1-4c6e60b1c0a1" 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_019e89fe-1b4a-7045-8ee6-ac3efc7541e6" xlink:to="loc_us-gaap_StockholdersEquity_019e89fe-1b4a-75bd-92a1-4c6e60b1c0a1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_019e89fe-1b4a-7a37-8253-70bfacc2272a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e89fe-1b4a-7045-8ee6-ac3efc7541e6" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_019e89fe-1b4a-7a37-8253-70bfacc2272a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_019e89fe-1b4a-7c36-950d-dac8a53d2f8a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e89fe-1b4a-7045-8ee6-ac3efc7541e6" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_019e89fe-1b4a-7c36-950d-dac8a53d2f8a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_019e89fe-1b4a-76b6-bd35-43fa0f6b178e" 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_019e89fe-1b4a-7045-8ee6-ac3efc7541e6" xlink:to="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_019e89fe-1b4a-76b6-bd35-43fa0f6b178e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_019e89fe-1b4a-73cb-ae47-9d738e30d72a" 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_019e89fe-1b4a-7045-8ee6-ac3efc7541e6" xlink:to="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_019e89fe-1b4a-73cb-ae47-9d738e30d72a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_019e89fe-1b4a-7507-9354-10f69462a1db" 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_019e89fe-1b4a-7045-8ee6-ac3efc7541e6" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_019e89fe-1b4a-7507-9354-10f69462a1db" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockSharesAcquired_019e89fe-1b4a-7f13-9ad7-19c273803754" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TreasuryStockSharesAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e89fe-1b4a-7045-8ee6-ac3efc7541e6" xlink:to="loc_us-gaap_TreasuryStockSharesAcquired_019e89fe-1b4a-7f13-9ad7-19c273803754" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_019e89fe-1b4a-7a69-b15f-c0251c35ef02" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e89fe-1b4a-7045-8ee6-ac3efc7541e6" xlink:to="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_019e89fe-1b4a-7a69-b15f-c0251c35ef02" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019e89fe-1b4a-7439-a38b-14b7ee5b3867" 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_019e89fe-1b4a-7045-8ee6-ac3efc7541e6" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019e89fe-1b4a-7439-a38b-14b7ee5b3867" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019e89fe-1b4a-7791-955e-5111f1702796" 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_019e89fe-1b4a-7045-8ee6-ac3efc7541e6" xlink:to="loc_us-gaap_NetIncomeLoss_019e89fe-1b4a-7791-955e-5111f1702796" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_019e89fe-1b4a-79c8-8b8a-b9c8dbefad4d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019e89fe-1b4a-7abe-8757-e88d21a18063" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workday.com/role/InvestmentsScheduleofMarketableSecuritiesDetails" xlink:type="simple" xlink:href="wday-20260731.xsd#InvestmentsScheduleofMarketableSecuritiesDetails"/>
  <link:definitionLink xlink:role="http://www.workday.com/role/InvestmentsScheduleofMarketableSecuritiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e89fe-1b4a-71b6-89ca-182b1e0420fe" 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_019e89fe-1b4a-7ed4-8f55-d1dc7793da97" 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_019e89fe-1b4a-71b6-89ca-182b1e0420fe" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019e89fe-1b4a-7ed4-8f55-d1dc7793da97" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019e89fe-1b4a-72c8-ab82-aa166b739087" 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_019e89fe-1b4a-7ed4-8f55-d1dc7793da97" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019e89fe-1b4a-72c8-ab82-aa166b739087" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89fe-1b4a-72c8-ab82-aa166b739087_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_019e89fe-1b4a-72c8-ab82-aa166b739087" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89fe-1b4a-72c8-ab82-aa166b739087_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89fe-1b4a-7938-a73e-80f565452eaa" 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_019e89fe-1b4a-72c8-ab82-aa166b739087" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89fe-1b4a-7938-a73e-80f565452eaa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasurySecuritiesMember_019e89fe-1b4a-7017-9e46-a3b7a4ff1e0d" 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_019e89fe-1b4a-7938-a73e-80f565452eaa" xlink:to="loc_us-gaap_USTreasurySecuritiesMember_019e89fe-1b4a-7017-9e46-a3b7a4ff1e0d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_019e89fe-1b4a-7c8e-8bf0-db2d391bcd1c" 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_019e89fe-1b4a-7938-a73e-80f565452eaa" xlink:to="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_019e89fe-1b4a-7c8e-8bf0-db2d391bcd1c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateBondSecuritiesMember_019e89fe-1b4a-73bd-b259-15aa0b7402d2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CorporateBondSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89fe-1b4a-7938-a73e-80f565452eaa" xlink:to="loc_us-gaap_CorporateBondSecuritiesMember_019e89fe-1b4a-73bd-b259-15aa0b7402d2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_019e89fe-1b4a-7e51-a2a0-2e22030f14dd" 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_019e89fe-1b4a-7938-a73e-80f565452eaa" xlink:to="loc_us-gaap_CommercialPaperMember_019e89fe-1b4a-7e51-a2a0-2e22030f14dd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_019e89fe-1b4a-7db8-98ee-04db4d8aae3f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89fe-1b4a-7938-a73e-80f565452eaa" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_019e89fe-1b4a-7db8-98ee-04db4d8aae3f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_SupranationalSecuritiesMember_019e89fe-1b4a-77bd-8acb-8ff6351c6e96" xlink:href="wday-20260731.xsd#wday_SupranationalSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89fe-1b4a-7938-a73e-80f565452eaa" xlink:to="loc_wday_SupranationalSecuritiesMember_019e89fe-1b4a-77bd-8acb-8ff6351c6e96" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfFinancialPositionLocationBalanceAxis_019e89fe-1b4a-7733-86d6-91c3a7c295c2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementOfFinancialPositionLocationBalanceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019e89fe-1b4a-7ed4-8f55-d1dc7793da97" xlink:to="loc_us-gaap_StatementOfFinancialPositionLocationBalanceAxis_019e89fe-1b4a-7733-86d6-91c3a7c295c2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss_019e89fe-1b4a-7fc3-9e23-db1a935e7933" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e89fe-1b4a-71b6-89ca-182b1e0420fe" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss_019e89fe-1b4a-7fc3-9e23-db1a935e7933" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_019e89fe-1b4a-7a78-93a8-b4dcda3dc6bd" 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_019e89fe-1b4a-71b6-89ca-182b1e0420fe" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_019e89fe-1b4a-7a78-93a8-b4dcda3dc6bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_019e89fe-1b4a-7eca-bc97-ea410e29b081" 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_019e89fe-1b4a-71b6-89ca-182b1e0420fe" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_019e89fe-1b4a-7eca-bc97-ea410e29b081" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_019e89fe-1b4a-7b56-81be-418e55d5fe83" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e89fe-1b4a-71b6-89ca-182b1e0420fe" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_019e89fe-1b4a-7b56-81be-418e55d5fe83" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workday.com/role/InvestmentsScheduleofMarketableSecuritiesDetails_1" xlink:type="simple" xlink:href="wday-20260731.xsd#InvestmentsScheduleofMarketableSecuritiesDetails_1"/>
  <link:definitionLink xlink:role="http://www.workday.com/role/InvestmentsScheduleofMarketableSecuritiesDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e89fe-1b4a-71b6-89ca-182b1e0420fe" 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_019e89fe-1b4a-7ed4-8f55-d1dc7793da97" 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_019e89fe-1b4a-71b6-89ca-182b1e0420fe" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019e89fe-1b4a-7ed4-8f55-d1dc7793da97" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019e89fe-1b4a-72c8-ab82-aa166b739087" 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_019e89fe-1b4a-7ed4-8f55-d1dc7793da97" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019e89fe-1b4a-72c8-ab82-aa166b739087" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89fe-1b4a-72c8-ab82-aa166b739087_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_019e89fe-1b4a-72c8-ab82-aa166b739087" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89fe-1b4a-72c8-ab82-aa166b739087_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89fe-1b4a-7938-a73e-80f565452eaa" 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_019e89fe-1b4a-72c8-ab82-aa166b739087" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89fe-1b4a-7938-a73e-80f565452eaa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasurySecuritiesMember_019e89fe-1b4a-7017-9e46-a3b7a4ff1e0d" 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_019e89fe-1b4a-7938-a73e-80f565452eaa" xlink:to="loc_us-gaap_USTreasurySecuritiesMember_019e89fe-1b4a-7017-9e46-a3b7a4ff1e0d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_019e89fe-1b4a-7c8e-8bf0-db2d391bcd1c" 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_019e89fe-1b4a-7938-a73e-80f565452eaa" xlink:to="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_019e89fe-1b4a-7c8e-8bf0-db2d391bcd1c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateBondSecuritiesMember_019e89fe-1b4a-73bd-b259-15aa0b7402d2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CorporateBondSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89fe-1b4a-7938-a73e-80f565452eaa" xlink:to="loc_us-gaap_CorporateBondSecuritiesMember_019e89fe-1b4a-73bd-b259-15aa0b7402d2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_019e89fe-1b4a-7e51-a2a0-2e22030f14dd" 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_019e89fe-1b4a-7938-a73e-80f565452eaa" xlink:to="loc_us-gaap_CommercialPaperMember_019e89fe-1b4a-7e51-a2a0-2e22030f14dd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_019e89fe-1b4a-7db8-98ee-04db4d8aae3f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89fe-1b4a-7938-a73e-80f565452eaa" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_019e89fe-1b4a-7db8-98ee-04db4d8aae3f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_SupranationalSecuritiesMember_019e89fe-1b4a-77bd-8acb-8ff6351c6e96" xlink:href="wday-20260731.xsd#wday_SupranationalSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89fe-1b4a-7938-a73e-80f565452eaa" xlink:to="loc_wday_SupranationalSecuritiesMember_019e89fe-1b4a-77bd-8acb-8ff6351c6e96" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss_019e89fe-1b4a-7fc3-9e23-db1a935e7933" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e89fe-1b4a-71b6-89ca-182b1e0420fe" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss_019e89fe-1b4a-7fc3-9e23-db1a935e7933" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_019e89fe-1b4a-7a78-93a8-b4dcda3dc6bd" 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_019e89fe-1b4a-71b6-89ca-182b1e0420fe" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_019e89fe-1b4a-7a78-93a8-b4dcda3dc6bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_019e89fe-1b4a-7eca-bc97-ea410e29b081" 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_019e89fe-1b4a-71b6-89ca-182b1e0420fe" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_019e89fe-1b4a-7eca-bc97-ea410e29b081" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_019e89fe-1b4a-7b56-81be-418e55d5fe83" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e89fe-1b4a-71b6-89ca-182b1e0420fe" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_019e89fe-1b4a-7b56-81be-418e55d5fe83" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workday.com/role/FairValueMeasurementsScheduleofAssetsandLiabilitiesMeasuredatFairValueonRecurringBasisDetails" xlink:type="simple" xlink:href="wday-20260731.xsd#FairValueMeasurementsScheduleofAssetsandLiabilitiesMeasuredatFairValueonRecurringBasisDetails"/>
  <link:definitionLink xlink:role="http://www.workday.com/role/FairValueMeasurementsScheduleofAssetsandLiabilitiesMeasuredatFairValueonRecurringBasisDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e89fe-1b4a-7977-b637-69c2f0397d6d" 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_019e89fe-1b4a-77af-a34b-f3045e7128a6" 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_019e89fe-1b4a-7977-b637-69c2f0397d6d" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e89fe-1b4a-77af-a34b-f3045e7128a6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019e89fe-1b4a-75ad-b225-bb2d6582010f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByMeasurementFrequencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e89fe-1b4a-77af-a34b-f3045e7128a6" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019e89fe-1b4a-75ad-b225-bb2d6582010f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_019e89fe-1b4a-75ad-b225-bb2d6582010f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019e89fe-1b4a-75ad-b225-bb2d6582010f" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_019e89fe-1b4a-75ad-b225-bb2d6582010f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_019e89fe-1b4a-72b2-b556-aa0feac0763c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019e89fe-1b4a-75ad-b225-bb2d6582010f" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_019e89fe-1b4a-72b2-b556-aa0feac0763c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_019e89fe-1b4a-73e3-8eb7-198c79c5e7ae" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsRecurringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_019e89fe-1b4a-72b2-b556-aa0feac0763c" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_019e89fe-1b4a-73e3-8eb7-198c79c5e7ae" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e89fe-1b4a-7c1c-822d-0f3b3e4b2a56" 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_019e89fe-1b4a-77af-a34b-f3045e7128a6" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e89fe-1b4a-7c1c-822d-0f3b3e4b2a56" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e89fe-1b4a-7c1c-822d-0f3b3e4b2a56_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_019e89fe-1b4a-7c1c-822d-0f3b3e4b2a56" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e89fe-1b4a-7c1c-822d-0f3b3e4b2a56_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e89fe-1b4a-7daf-8320-99f6f8ebc7c2" 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_019e89fe-1b4a-7c1c-822d-0f3b3e4b2a56" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e89fe-1b4a-7daf-8320-99f6f8ebc7c2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_019e89fe-1b4a-7715-9188-b60986819deb" 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_019e89fe-1b4a-7daf-8320-99f6f8ebc7c2" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_019e89fe-1b4a-7715-9188-b60986819deb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019e89fe-1b4a-73db-9205-8b8f4f8b2ddb" 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_019e89fe-1b4a-7daf-8320-99f6f8ebc7c2" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019e89fe-1b4a-73db-9205-8b8f4f8b2ddb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019e89fe-1b4a-786f-b2fb-968f0f49a8ad" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e89fe-1b4a-7daf-8320-99f6f8ebc7c2" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019e89fe-1b4a-786f-b2fb-968f0f49a8ad" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019e89fe-1b4a-749b-9bc5-1337aee10a3a" 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_019e89fe-1b4a-77af-a34b-f3045e7128a6" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019e89fe-1b4a-749b-9bc5-1337aee10a3a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89fe-1b4a-749b-9bc5-1337aee10a3a_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_019e89fe-1b4a-749b-9bc5-1337aee10a3a" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89fe-1b4a-749b-9bc5-1337aee10a3a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89fe-1b4a-7c38-bd95-2ff190a062e9" 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_019e89fe-1b4a-749b-9bc5-1337aee10a3a" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89fe-1b4a-7c38-bd95-2ff190a062e9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasurySecuritiesMember_019e89fe-1b4a-789d-adc2-91bec4105be9" 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_019e89fe-1b4a-7c38-bd95-2ff190a062e9" xlink:to="loc_us-gaap_USTreasurySecuritiesMember_019e89fe-1b4a-789d-adc2-91bec4105be9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_019e89fe-1b4a-7e74-9643-01baf3e1a7c3" 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_019e89fe-1b4a-7c38-bd95-2ff190a062e9" xlink:to="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_019e89fe-1b4a-7e74-9643-01baf3e1a7c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateBondSecuritiesMember_019e89fe-1b4a-7fe6-afd6-8f67f17ef9d8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CorporateBondSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89fe-1b4a-7c38-bd95-2ff190a062e9" xlink:to="loc_us-gaap_CorporateBondSecuritiesMember_019e89fe-1b4a-7fe6-afd6-8f67f17ef9d8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_019e89fe-1b4a-7daf-ad75-6a0b854c8c8d" 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_019e89fe-1b4a-7c38-bd95-2ff190a062e9" xlink:to="loc_us-gaap_CommercialPaperMember_019e89fe-1b4a-7daf-ad75-6a0b854c8c8d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_019e89fe-1b4a-7d7a-9d68-2e0dd92709c4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89fe-1b4a-7c38-bd95-2ff190a062e9" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_019e89fe-1b4a-7d7a-9d68-2e0dd92709c4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_SupranationalSecuritiesMember_019e89fe-1b4a-77ba-8982-3ab51606692f" xlink:href="wday-20260731.xsd#wday_SupranationalSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89fe-1b4a-7c38-bd95-2ff190a062e9" xlink:to="loc_wday_SupranationalSecuritiesMember_019e89fe-1b4a-77ba-8982-3ab51606692f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MoneyMarketFundsMember_019e89fe-1b4a-7183-8e9e-28b04a3cf2e1" 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_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89fe-1b4a-7c38-bd95-2ff190a062e9" xlink:to="loc_us-gaap_MoneyMarketFundsMember_019e89fe-1b4a-7183-8e9e-28b04a3cf2e1" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_019e89fe-1b4a-7bdd-b9fa-f41a52c379c7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e89fe-1b4a-7977-b637-69c2f0397d6d" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_019e89fe-1b4a-7bdd-b9fa-f41a52c379c7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_019e89fe-1b4a-7501-b2d5-b7f0d480bc71" 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_019e89fe-1b4a-7977-b637-69c2f0397d6d" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_019e89fe-1b4a-7501-b2d5-b7f0d480bc71" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssets_019e89fe-1b4a-7b99-a5c0-1762d91c1675" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e89fe-1b4a-7977-b637-69c2f0397d6d" xlink:to="loc_us-gaap_DerivativeAssets_019e89fe-1b4a-7b99-a5c0-1762d91c1675" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_019e89fe-1b4a-77ba-baf5-7ce944d60934" 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_019e89fe-1b4a-7977-b637-69c2f0397d6d" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_019e89fe-1b4a-77ba-baf5-7ce944d60934" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilities_019e89fe-1b4a-78e1-bfbe-a046e99af462" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e89fe-1b4a-7977-b637-69c2f0397d6d" xlink:to="loc_us-gaap_DerivativeLiabilities_019e89fe-1b4a-78e1-bfbe-a046e99af462" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosure_019e89fe-1b4a-78ad-b34d-46e06e3efbfb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e89fe-1b4a-7977-b637-69c2f0397d6d" xlink:to="loc_us-gaap_LiabilitiesFairValueDisclosure_019e89fe-1b4a-78ad-b34d-46e06e3efbfb" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workday.com/role/PropertyandEquipmentNetScheduleofPropertyandEquipmentDetails" xlink:type="simple" xlink:href="wday-20260731.xsd#PropertyandEquipmentNetScheduleofPropertyandEquipmentDetails"/>
  <link:definitionLink xlink:role="http://www.workday.com/role/PropertyandEquipmentNetScheduleofPropertyandEquipmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e89fe-1b4a-7c5d-b777-a8f0a08030b7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019e89fe-1b4a-7985-9095-85412d8e70c9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e89fe-1b4a-7c5d-b777-a8f0a08030b7" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019e89fe-1b4a-7985-9095-85412d8e70c9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019e89fe-1b4a-7d18-8969-92df77c18fca" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019e89fe-1b4a-7985-9095-85412d8e70c9" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019e89fe-1b4a-7d18-8969-92df77c18fca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e89fe-1b4a-7d18-8969-92df77c18fca_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019e89fe-1b4a-7d18-8969-92df77c18fca" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e89fe-1b4a-7d18-8969-92df77c18fca_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e89fe-1b4a-7810-9caa-6a51402bc6a7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019e89fe-1b4a-7d18-8969-92df77c18fca" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e89fe-1b4a-7810-9caa-6a51402bc6a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TechnologyEquipmentMember_019e89fe-1b4a-7207-9983-c9b0ad3f8300" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TechnologyEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e89fe-1b4a-7810-9caa-6a51402bc6a7" xlink:to="loc_us-gaap_TechnologyEquipmentMember_019e89fe-1b4a-7207-9983-c9b0ad3f8300" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingMember_019e89fe-1b4a-7e04-a3ab-e64cc8acf04c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BuildingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e89fe-1b4a-7810-9caa-6a51402bc6a7" xlink:to="loc_us-gaap_BuildingMember_019e89fe-1b4a-7e04-a3ab-e64cc8acf04c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_019e89fe-1b4a-745e-9f71-2fbbeeb587ed" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LeaseholdImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e89fe-1b4a-7810-9caa-6a51402bc6a7" xlink:to="loc_us-gaap_LeaseholdImprovementsMember_019e89fe-1b4a-745e-9f71-2fbbeeb587ed" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_FurnitureFixturesAndTransportationEquipmentMember_019e89fe-1b4a-72dc-b4fd-bf49cd8f5906" xlink:href="wday-20260731.xsd#wday_FurnitureFixturesAndTransportationEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e89fe-1b4a-7810-9caa-6a51402bc6a7" xlink:to="loc_wday_FurnitureFixturesAndTransportationEquipmentMember_019e89fe-1b4a-72dc-b4fd-bf49cd8f5906" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandAndLandImprovementsMember_019e89fe-1b4a-7580-9190-120ef84b72c0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LandAndLandImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e89fe-1b4a-7810-9caa-6a51402bc6a7" xlink:to="loc_us-gaap_LandAndLandImprovementsMember_019e89fe-1b4a-7580-9190-120ef84b72c0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_019e89fe-1b4a-7a30-8918-dd81d82cf58c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e89fe-1b4a-7c5d-b777-a8f0a08030b7" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_019e89fe-1b4a-7a30-8918-dd81d82cf58c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_019e89fe-1b4a-7c46-991a-dd7241e56c5a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e89fe-1b4a-7c5d-b777-a8f0a08030b7" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_019e89fe-1b4a-7c46-991a-dd7241e56c5a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_019e89fe-1b4a-75d4-82a8-ca2b9462fc07" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e89fe-1b4a-7c5d-b777-a8f0a08030b7" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_019e89fe-1b4a-75d4-82a8-ca2b9462fc07" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workday.com/role/PropertyandEquipmentNetNarrativeDetails" xlink:type="simple" xlink:href="wday-20260731.xsd#PropertyandEquipmentNetNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.workday.com/role/PropertyandEquipmentNetNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e89fe-1b4a-7fa5-80ea-d818ceeeef23" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019e89fe-1b4a-7669-8b6b-97e150161b7a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e89fe-1b4a-7fa5-80ea-d818ceeeef23" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019e89fe-1b4a-7669-8b6b-97e150161b7a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveAxis_019e89fe-1b4a-768d-b948-ac154b6d5be4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestructuringCostAndReserveAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019e89fe-1b4a-7669-8b6b-97e150161b7a" xlink:to="loc_us-gaap_RestructuringCostAndReserveAxis_019e89fe-1b4a-768d-b948-ac154b6d5be4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_019e89fe-1b4a-768d-b948-ac154b6d5be4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_019e89fe-1b4a-768d-b948-ac154b6d5be4" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_019e89fe-1b4a-768d-b948-ac154b6d5be4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_019e89fe-1b4a-79c3-9473-36b8ba0c9e8b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_019e89fe-1b4a-768d-b948-ac154b6d5be4" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_019e89fe-1b4a-79c3-9473-36b8ba0c9e8b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_OfficeSpaceReductionAndOtherLongLivedAssetsMember_019e89fe-1b4a-78ac-816e-fdc3358df4dd" xlink:href="wday-20260731.xsd#wday_OfficeSpaceReductionAndOtherLongLivedAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_019e89fe-1b4a-79c3-9473-36b8ba0c9e8b" xlink:to="loc_wday_OfficeSpaceReductionAndOtherLongLivedAssetsMember_019e89fe-1b4a-78ac-816e-fdc3358df4dd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetImpairmentCharges_019e89fe-1b4a-7575-82c5-0459bc4004c1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetImpairmentCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e89fe-1b4a-7fa5-80ea-d818ceeeef23" xlink:to="loc_us-gaap_AssetImpairmentCharges_019e89fe-1b4a-7575-82c5-0459bc4004c1" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workday.com/role/AcquisitionRelatedIntangibleAssetsNetScheduleofAcquiredAssetsDetails" xlink:type="simple" xlink:href="wday-20260731.xsd#AcquisitionRelatedIntangibleAssetsNetScheduleofAcquiredAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.workday.com/role/AcquisitionRelatedIntangibleAssetsNetScheduleofAcquiredAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019e89fe-1bfd-7b29-90cd-87871fe87dc2" 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_019e89fe-1bfd-7685-a143-dd47d95afa32" 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_019e89fe-1bfd-7b29-90cd-87871fe87dc2" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019e89fe-1bfd-7685-a143-dd47d95afa32" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019e89fe-1bfd-7813-8981-9e5de66bfb38" 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_019e89fe-1bfd-7685-a143-dd47d95afa32" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019e89fe-1bfd-7813-8981-9e5de66bfb38" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e89fe-1bfd-7813-8981-9e5de66bfb38_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_019e89fe-1bfd-7813-8981-9e5de66bfb38" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e89fe-1bfd-7813-8981-9e5de66bfb38_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e89fe-1bfd-733f-8031-beae4735fca0" 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_019e89fe-1bfd-7813-8981-9e5de66bfb38" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e89fe-1bfd-733f-8031-beae4735fca0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_019e89fe-1bfd-7947-a9d7-6a35f22c2206" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DevelopedTechnologyRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e89fe-1bfd-733f-8031-beae4735fca0" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_019e89fe-1bfd-7947-a9d7-6a35f22c2206" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_019e89fe-1bfd-73ca-837b-e0b2dc0d8077" 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_019e89fe-1bfd-733f-8031-beae4735fca0" xlink:to="loc_us-gaap_CustomerRelationshipsMember_019e89fe-1bfd-73ca-837b-e0b2dc0d8077" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OrderOrProductionBacklogMember_019e89fe-1bfd-72f8-842c-721550ca4af5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OrderOrProductionBacklogMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e89fe-1bfd-733f-8031-beae4735fca0" xlink:to="loc_us-gaap_OrderOrProductionBacklogMember_019e89fe-1bfd-72f8-842c-721550ca4af5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_019e89fe-1bfd-72aa-81b9-4864945dc305" 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_019e89fe-1bfd-733f-8031-beae4735fca0" xlink:to="loc_us-gaap_TradeNamesMember_019e89fe-1bfd-72aa-81b9-4864945dc305" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_AcquiredIntangibleAssetsMember_019e89fe-1bfd-744d-89f9-855022175431" xlink:href="wday-20260731.xsd#wday_AcquiredIntangibleAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e89fe-1bfd-733f-8031-beae4735fca0" xlink:to="loc_wday_AcquiredIntangibleAssetsMember_019e89fe-1bfd-744d-89f9-855022175431" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_019e89fe-1bfd-75ac-8226-efe0ae7b8e06" 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_019e89fe-1bfd-7b29-90cd-87871fe87dc2" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_019e89fe-1bfd-75ac-8226-efe0ae7b8e06" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019e89fe-1bfd-7614-b8a2-3d2234fb21f4" 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_019e89fe-1bfd-7b29-90cd-87871fe87dc2" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019e89fe-1bfd-7614-b8a2-3d2234fb21f4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019e89fe-1bfd-72dd-a1c5-f6c0d3783bc3" 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_019e89fe-1bfd-7b29-90cd-87871fe87dc2" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019e89fe-1bfd-72dd-a1c5-f6c0d3783bc3" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workday.com/role/AcquisitionRelatedIntangibleAssetsNetScheduleofFutureEstimatedAmortizationExpenseDetail" xlink:type="simple" xlink:href="wday-20260731.xsd#AcquisitionRelatedIntangibleAssetsNetScheduleofFutureEstimatedAmortizationExpenseDetail"/>
  <link:definitionLink xlink:role="http://www.workday.com/role/AcquisitionRelatedIntangibleAssetsNetScheduleofFutureEstimatedAmortizationExpenseDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019e89fe-1bfd-7bb6-84de-2897a27c1fa9" 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_019e89fe-1bfd-7ab4-bf82-a3efaa514462" 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_019e89fe-1bfd-7bb6-84de-2897a27c1fa9" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019e89fe-1bfd-7ab4-bf82-a3efaa514462" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019e89fe-1bfd-70ec-a7c9-30418c731dfc" 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_019e89fe-1bfd-7ab4-bf82-a3efaa514462" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019e89fe-1bfd-70ec-a7c9-30418c731dfc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e89fe-1bfd-70ec-a7c9-30418c731dfc_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_019e89fe-1bfd-70ec-a7c9-30418c731dfc" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e89fe-1bfd-70ec-a7c9-30418c731dfc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e89fe-1bfd-7661-bffd-341da56f0423" 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_019e89fe-1bfd-70ec-a7c9-30418c731dfc" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e89fe-1bfd-7661-bffd-341da56f0423" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_AcquiredIntangibleAssetsMember_019e89fe-1bfd-74ab-9733-1b4b0111eb4e" xlink:href="wday-20260731.xsd#wday_AcquiredIntangibleAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e89fe-1bfd-7661-bffd-341da56f0423" xlink:to="loc_wday_AcquiredIntangibleAssetsMember_019e89fe-1bfd-74ab-9733-1b4b0111eb4e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_019e89fe-1bfd-77af-aa31-689367b65a78" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019e89fe-1bfd-7bb6-84de-2897a27c1fa9" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_019e89fe-1bfd-77af-aa31-689367b65a78" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_019e89fe-1bfd-7586-808c-578aceb92a7b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_019e89fe-1bfd-77af-aa31-689367b65a78" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_019e89fe-1bfd-7586-808c-578aceb92a7b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_019e89fe-1bfd-711e-8b68-093589f711a4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_019e89fe-1bfd-77af-aa31-689367b65a78" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_019e89fe-1bfd-711e-8b68-093589f711a4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_019e89fe-1bfd-7c6a-938a-4131cb3a2e8c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_019e89fe-1bfd-77af-aa31-689367b65a78" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_019e89fe-1bfd-7c6a-938a-4131cb3a2e8c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_019e89fe-1bfd-7d16-8e60-6bbbf2d002e0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_019e89fe-1bfd-77af-aa31-689367b65a78" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_019e89fe-1bfd-7d16-8e60-6bbbf2d002e0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_019e89fe-1bfd-7007-beb0-f2efa52475b0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_019e89fe-1bfd-77af-aa31-689367b65a78" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_019e89fe-1bfd-7007-beb0-f2efa52475b0" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour_019e89fe-1bfd-7a71-a0d8-440082b3f2e7" xlink:href="wday-20260731.xsd#wday_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_019e89fe-1bfd-77af-aa31-689367b65a78" xlink:to="loc_wday_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour_019e89fe-1bfd-7a71-a0d8-440082b3f2e7" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019e89fe-1bfd-76c0-904f-dd3249fe9792" 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_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_019e89fe-1bfd-77af-aa31-689367b65a78" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019e89fe-1bfd-76c0-904f-dd3249fe9792" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workday.com/role/OtherAssetsScheduleofOtherAssetsDetails" xlink:type="simple" xlink:href="wday-20260731.xsd#OtherAssetsScheduleofOtherAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.workday.com/role/OtherAssetsScheduleofOtherAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_wday_OtherAssetsLineItems_019e89fe-1bfd-7517-b771-fe94448449da" xlink:href="wday-20260731.xsd#wday_OtherAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_OtherAssetsTable_019e89fe-1bfd-790e-898f-3a9a8020dde6" xlink:href="wday-20260731.xsd#wday_OtherAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_wday_OtherAssetsLineItems_019e89fe-1bfd-7517-b771-fe94448449da" xlink:to="loc_wday_OtherAssetsTable_019e89fe-1bfd-790e-898f-3a9a8020dde6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019e89fe-1bfd-71c8-a73e-ef135c2443b8" 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_wday_OtherAssetsTable_019e89fe-1bfd-790e-898f-3a9a8020dde6" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019e89fe-1bfd-71c8-a73e-ef135c2443b8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e89fe-1bfd-71c8-a73e-ef135c2443b8_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_019e89fe-1bfd-71c8-a73e-ef135c2443b8" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e89fe-1bfd-71c8-a73e-ef135c2443b8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e89fe-1bfd-761e-86f3-fda9ebcdc5f3" 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_019e89fe-1bfd-71c8-a73e-ef135c2443b8" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e89fe-1bfd-761e-86f3-fda9ebcdc5f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_TechnologyPatentsAndOtherIntangibleAssetsNetMember_019e89fe-1bfd-7a24-859d-e4330c3191f4" xlink:href="wday-20260731.xsd#wday_TechnologyPatentsAndOtherIntangibleAssetsNetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e89fe-1bfd-761e-86f3-fda9ebcdc5f3" xlink:to="loc_wday_TechnologyPatentsAndOtherIntangibleAssetsNetMember_019e89fe-1bfd-7a24-859d-e4330c3191f4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLongTermInvestments_019e89fe-1bfd-75c3-847e-6cdf58f195ec" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLongTermInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wday_OtherAssetsLineItems_019e89fe-1bfd-7517-b771-fe94448449da" xlink:to="loc_us-gaap_OtherLongTermInvestments_019e89fe-1bfd-75c3-847e-6cdf58f195ec" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerAssetNetNoncurrent_019e89fe-1bfd-7b2d-ad6f-bebab0bf3d93" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerAssetNetNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wday_OtherAssetsLineItems_019e89fe-1bfd-7517-b771-fe94448449da" xlink:to="loc_us-gaap_ContractWithCustomerAssetNetNoncurrent_019e89fe-1bfd-7b2d-ad6f-bebab0bf3d93" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseNoncurrent_019e89fe-1bfd-774c-96f0-b429d5301c11" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PrepaidExpenseNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wday_OtherAssetsLineItems_019e89fe-1bfd-7517-b771-fe94448449da" xlink:to="loc_us-gaap_PrepaidExpenseNoncurrent_019e89fe-1bfd-774c-96f0-b429d5301c11" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019e89fe-1bfd-7fe0-9357-a17d6db66afa" 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_wday_OtherAssetsLineItems_019e89fe-1bfd-7517-b771-fe94448449da" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019e89fe-1bfd-7fe0-9357-a17d6db66afa" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetsNoncurrent_019e89fe-1bfd-7ea0-a378-ca7d311fc750" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wday_OtherAssetsLineItems_019e89fe-1bfd-7517-b771-fe94448449da" xlink:to="loc_us-gaap_DerivativeAssetsNoncurrent_019e89fe-1bfd-7ea0-a378-ca7d311fc750" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepositsAssetsNoncurrent_019e89fe-1bfd-754c-a996-8f3f5b317c99" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DepositsAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wday_OtherAssetsLineItems_019e89fe-1bfd-7517-b771-fe94448449da" xlink:to="loc_us-gaap_DepositsAssetsNoncurrent_019e89fe-1bfd-754c-a996-8f3f5b317c99" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsMiscellaneousNoncurrent_019e89fe-1bfd-7b0f-a4ef-9982b063d72b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAssetsMiscellaneousNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wday_OtherAssetsLineItems_019e89fe-1bfd-7517-b771-fe94448449da" xlink:to="loc_us-gaap_OtherAssetsMiscellaneousNoncurrent_019e89fe-1bfd-7b0f-a4ef-9982b063d72b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_019e89fe-1bfd-73bd-b5e7-7a8d84e59082" 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_wday_OtherAssetsLineItems_019e89fe-1bfd-7517-b771-fe94448449da" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_019e89fe-1bfd-73bd-b5e7-7a8d84e59082" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workday.com/role/OtherAssetsScheduleofFutureEstimatedAmortizationExpenseRelatedToTechnologyPatentsandOtherIntangibleAssetsDetails" xlink:type="simple" xlink:href="wday-20260731.xsd#OtherAssetsScheduleofFutureEstimatedAmortizationExpenseRelatedToTechnologyPatentsandOtherIntangibleAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.workday.com/role/OtherAssetsScheduleofFutureEstimatedAmortizationExpenseRelatedToTechnologyPatentsandOtherIntangibleAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019e89fe-1bfd-772c-b758-2fe6311b9a6c" 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_019e89fe-1bfd-7b3e-8600-78013a6d2eba" 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_019e89fe-1bfd-772c-b758-2fe6311b9a6c" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019e89fe-1bfd-7b3e-8600-78013a6d2eba" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019e89fe-1bfd-72cc-8df8-1a55ce1e803f" 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_019e89fe-1bfd-7b3e-8600-78013a6d2eba" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019e89fe-1bfd-72cc-8df8-1a55ce1e803f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e89fe-1bfd-72cc-8df8-1a55ce1e803f_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_019e89fe-1bfd-72cc-8df8-1a55ce1e803f" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e89fe-1bfd-72cc-8df8-1a55ce1e803f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e89fe-1bfd-7caa-ac4a-83b97a91b08e" 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_019e89fe-1bfd-72cc-8df8-1a55ce1e803f" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e89fe-1bfd-7caa-ac4a-83b97a91b08e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_TechnologyPatentsAndOtherIntangibleAssetsNetMember_019e89fe-1bfd-751d-be8b-433734c37c4b" xlink:href="wday-20260731.xsd#wday_TechnologyPatentsAndOtherIntangibleAssetsNetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e89fe-1bfd-7caa-ac4a-83b97a91b08e" xlink:to="loc_wday_TechnologyPatentsAndOtherIntangibleAssetsNetMember_019e89fe-1bfd-751d-be8b-433734c37c4b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_019e89fe-1bfd-78ea-864e-8bac3e96b5c8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019e89fe-1bfd-772c-b758-2fe6311b9a6c" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_019e89fe-1bfd-78ea-864e-8bac3e96b5c8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_019e89fe-1bfd-7a8d-a16c-d6e051be97b5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_019e89fe-1bfd-78ea-864e-8bac3e96b5c8" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_019e89fe-1bfd-7a8d-a16c-d6e051be97b5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_019e89fe-1bfd-73a2-a241-83409f4eaf96" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_019e89fe-1bfd-78ea-864e-8bac3e96b5c8" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_019e89fe-1bfd-73a2-a241-83409f4eaf96" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_019e89fe-1bfd-789f-9b67-c7a30e8f2ab7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_019e89fe-1bfd-78ea-864e-8bac3e96b5c8" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_019e89fe-1bfd-789f-9b67-c7a30e8f2ab7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_019e89fe-1bfd-7c50-a490-83cf1a7d084d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_019e89fe-1bfd-78ea-864e-8bac3e96b5c8" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_019e89fe-1bfd-7c50-a490-83cf1a7d084d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_019e89fe-1bfd-7b1d-8181-dcab98c7e366" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_019e89fe-1bfd-78ea-864e-8bac3e96b5c8" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_019e89fe-1bfd-7b1d-8181-dcab98c7e366" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour_019e89fe-1bfd-7d3f-9264-0263919a9511" xlink:href="wday-20260731.xsd#wday_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_019e89fe-1bfd-78ea-864e-8bac3e96b5c8" xlink:to="loc_wday_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour_019e89fe-1bfd-7d3f-9264-0263919a9511" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019e89fe-1bfd-7909-a613-b73b0b9b92bf" 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_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_019e89fe-1bfd-78ea-864e-8bac3e96b5c8" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019e89fe-1bfd-7909-a613-b73b0b9b92bf" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workday.com/role/DerivativeInstrumentsNarrativeDetails" xlink:type="simple" xlink:href="wday-20260731.xsd#DerivativeInstrumentsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.workday.com/role/DerivativeInstrumentsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_019e89fe-1bfd-71b3-8db5-de194af00d63" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_019e89fe-1bfd-7565-b5ea-b4ed53f3e725" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_019e89fe-1bfd-71b3-8db5-de194af00d63" xlink:to="loc_us-gaap_DerivativeTable_019e89fe-1bfd-7565-b5ea-b4ed53f3e725" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e89fe-1bfd-7980-9690-82500dcf7f61" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_019e89fe-1bfd-7565-b5ea-b4ed53f3e725" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e89fe-1bfd-7980-9690-82500dcf7f61" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_019e89fe-1bfd-7980-9690-82500dcf7f61_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e89fe-1bfd-7980-9690-82500dcf7f61" xlink:to="loc_us-gaap_HedgingRelationshipDomain_019e89fe-1bfd-7980-9690-82500dcf7f61_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_019e89fe-1bfd-755e-9c96-d7736283f8bd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e89fe-1bfd-7980-9690-82500dcf7f61" xlink:to="loc_us-gaap_HedgingRelationshipDomain_019e89fe-1bfd-755e-9c96-d7736283f8bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashFlowHedgingMember_019e89fe-1bfd-7801-b9f4-4d1e9c5fc517" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashFlowHedgingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingRelationshipDomain_019e89fe-1bfd-755e-9c96-d7736283f8bd" xlink:to="loc_us-gaap_CashFlowHedgingMember_019e89fe-1bfd-7801-b9f4-4d1e9c5fc517" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_019e89fe-1bfd-72d7-b164-1c7c35f7f42c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_019e89fe-1bfd-7565-b5ea-b4ed53f3e725" xlink:to="loc_us-gaap_HedgingDesignationAxis_019e89fe-1bfd-72d7-b164-1c7c35f7f42c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e89fe-1bfd-72d7-b164-1c7c35f7f42c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e89fe-1bfd-72d7-b164-1c7c35f7f42c" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e89fe-1bfd-72d7-b164-1c7c35f7f42c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e89fe-1bfd-7aad-8734-1ea41b41c2f9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e89fe-1bfd-72d7-b164-1c7c35f7f42c" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e89fe-1bfd-7aad-8734-1ea41b41c2f9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019e89fe-1bfd-7120-96f3-04d97ced279b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019e89fe-1bfd-7aad-8734-1ea41b41c2f9" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019e89fe-1bfd-7120-96f3-04d97ced279b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_019e89fe-1bfd-7ec9-9c26-398aef33bdb9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019e89fe-1bfd-7aad-8734-1ea41b41c2f9" xlink:to="loc_us-gaap_NondesignatedMember_019e89fe-1bfd-7ec9-9c26-398aef33bdb9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019e89fe-1bfd-76be-9bf5-7fd664675cc9" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_019e89fe-1bfd-7565-b5ea-b4ed53f3e725" xlink:to="loc_srt_RangeAxis_019e89fe-1bfd-76be-9bf5-7fd664675cc9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e89fe-1bfd-76be-9bf5-7fd664675cc9_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019e89fe-1bfd-76be-9bf5-7fd664675cc9" xlink:to="loc_srt_RangeMember_019e89fe-1bfd-76be-9bf5-7fd664675cc9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e89fe-1bfd-763d-a0cf-e02a191e7580" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019e89fe-1bfd-76be-9bf5-7fd664675cc9" xlink:to="loc_srt_RangeMember_019e89fe-1bfd-763d-a0cf-e02a191e7580" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019e89fe-1bfd-7eb3-b3f8-611e82694d67" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e89fe-1bfd-763d-a0cf-e02a191e7580" xlink:to="loc_srt_MaximumMember_019e89fe-1bfd-7eb3-b3f8-611e82694d67" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PositionAxis_019e89fe-1bfd-7e8b-ac5c-9253b8aac100" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PositionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_019e89fe-1bfd-7565-b5ea-b4ed53f3e725" xlink:to="loc_us-gaap_PositionAxis_019e89fe-1bfd-7e8b-ac5c-9253b8aac100" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PositionDomain_019e89fe-1bfd-7e8b-ac5c-9253b8aac100_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PositionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PositionAxis_019e89fe-1bfd-7e8b-ac5c-9253b8aac100" xlink:to="loc_us-gaap_PositionDomain_019e89fe-1bfd-7e8b-ac5c-9253b8aac100_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PositionDomain_019e89fe-1bfd-7346-acc4-b53c96754ecb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PositionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PositionAxis_019e89fe-1bfd-7e8b-ac5c-9253b8aac100" xlink:to="loc_us-gaap_PositionDomain_019e89fe-1bfd-7346-acc4-b53c96754ecb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongMember_019e89fe-1bfd-70e0-a97a-52cf0ee3d80f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PositionDomain_019e89fe-1bfd-7346-acc4-b53c96754ecb" xlink:to="loc_us-gaap_LongMember_019e89fe-1bfd-70e0-a97a-52cf0ee3d80f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortMember_019e89fe-1bfd-7215-bcae-c6e8a168d5b4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PositionDomain_019e89fe-1bfd-7346-acc4-b53c96754ecb" xlink:to="loc_us-gaap_ShortMember_019e89fe-1bfd-7215-bcae-c6e8a168d5b4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyCashFlowHedgeGainLossToBeReclassifiedDuringNext12Months_019e89fe-1bfd-77f1-9ff0-e6836395e4d3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForeignCurrencyCashFlowHedgeGainLossToBeReclassifiedDuringNext12Months"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_019e89fe-1bfd-71b3-8db5-de194af00d63" xlink:to="loc_us-gaap_ForeignCurrencyCashFlowHedgeGainLossToBeReclassifiedDuringNext12Months_019e89fe-1bfd-77f1-9ff0-e6836395e4d3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNotionalAmount_019e89fe-1bfd-7b88-a700-84c604bb0ff6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeNotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_019e89fe-1bfd-71b3-8db5-de194af00d63" xlink:to="loc_us-gaap_DerivativeNotionalAmount_019e89fe-1bfd-7b88-a700-84c604bb0ff6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeRemainingMaturity1_019e89fe-1bfd-7326-a76a-82184fdfbf45" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeRemainingMaturity1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_019e89fe-1bfd-71b3-8db5-de194af00d63" xlink:to="loc_us-gaap_DerivativeRemainingMaturity1_019e89fe-1bfd-7326-a76a-82184fdfbf45" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_NumberOfFinancialInstitutions_019e89fe-1bfd-71aa-9a73-f310ad6a2c30" xlink:href="wday-20260731.xsd#wday_NumberOfFinancialInstitutions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_019e89fe-1bfd-71b3-8db5-de194af00d63" xlink:to="loc_wday_NumberOfFinancialInstitutions_019e89fe-1bfd-71aa-9a73-f310ad6a2c30" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral_019e89fe-1bfd-7fde-bb8d-7a721a822fb5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_019e89fe-1bfd-71b3-8db5-de194af00d63" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral_019e89fe-1bfd-7fde-bb8d-7a721a822fb5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral_019e89fe-1bfd-7de3-a318-2f976f90a95b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_019e89fe-1bfd-71b3-8db5-de194af00d63" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral_019e89fe-1bfd-7de3-a318-2f976f90a95b" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workday.com/role/DerivativeInstrumentsScheduleofFairValuesofOutstandingDerivativeInstrumentsDetails" xlink:type="simple" xlink:href="wday-20260731.xsd#DerivativeInstrumentsScheduleofFairValuesofOutstandingDerivativeInstrumentsDetails"/>
  <link:definitionLink xlink:role="http://www.workday.com/role/DerivativeInstrumentsScheduleofFairValuesofOutstandingDerivativeInstrumentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativesFairValueLineItems_019e89fe-1bfd-76eb-b4c2-6de4c12b65ea" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativesFairValueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e89fe-1bfd-7f55-8cc1-01429970aeba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e89fe-1bfd-76eb-b4c2-6de4c12b65ea" xlink:to="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e89fe-1bfd-7f55-8cc1-01429970aeba" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e89fe-1bfd-7e6c-b1c5-7fb8144b6629" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e89fe-1bfd-7f55-8cc1-01429970aeba" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e89fe-1bfd-7e6c-b1c5-7fb8144b6629" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_019e89fe-1bfd-7e6c-b1c5-7fb8144b6629_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e89fe-1bfd-7e6c-b1c5-7fb8144b6629" xlink:to="loc_us-gaap_HedgingRelationshipDomain_019e89fe-1bfd-7e6c-b1c5-7fb8144b6629_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_019e89fe-1bfd-74f2-864e-ec719d771a8c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e89fe-1bfd-7e6c-b1c5-7fb8144b6629" xlink:to="loc_us-gaap_HedgingRelationshipDomain_019e89fe-1bfd-74f2-864e-ec719d771a8c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashFlowHedgingMember_019e89fe-1bfd-7280-9141-1c2ae15e67b8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashFlowHedgingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingRelationshipDomain_019e89fe-1bfd-74f2-864e-ec719d771a8c" xlink:to="loc_us-gaap_CashFlowHedgingMember_019e89fe-1bfd-7280-9141-1c2ae15e67b8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_019e89fe-1bfd-709d-bb7e-a06f26484988" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e89fe-1bfd-7f55-8cc1-01429970aeba" xlink:to="loc_us-gaap_HedgingDesignationAxis_019e89fe-1bfd-709d-bb7e-a06f26484988" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e89fe-1bfd-709d-bb7e-a06f26484988_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e89fe-1bfd-709d-bb7e-a06f26484988" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e89fe-1bfd-709d-bb7e-a06f26484988_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e89fe-1bfd-76c9-a8c1-dc6016f54053" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e89fe-1bfd-709d-bb7e-a06f26484988" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e89fe-1bfd-76c9-a8c1-dc6016f54053" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019e89fe-1bfd-77a7-9cd2-20e1a08b3e80" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019e89fe-1bfd-76c9-a8c1-dc6016f54053" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019e89fe-1bfd-77a7-9cd2-20e1a08b3e80" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_019e89fe-1bfd-775b-8fcf-b079226009e5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019e89fe-1bfd-76c9-a8c1-dc6016f54053" xlink:to="loc_us-gaap_NondesignatedMember_019e89fe-1bfd-775b-8fcf-b079226009e5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfFinancialPositionLocationBalanceAxis_019e89fe-1bfd-7788-9585-f4b006539293" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementOfFinancialPositionLocationBalanceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e89fe-1bfd-7f55-8cc1-01429970aeba" xlink:to="loc_us-gaap_StatementOfFinancialPositionLocationBalanceAxis_019e89fe-1bfd-7788-9585-f4b006539293" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e89fe-1bfd-7c22-9fb3-8db933172b9b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e89fe-1bfd-76eb-b4c2-6de4c12b65ea" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e89fe-1bfd-7c22-9fb3-8db933172b9b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019e89fe-1bfd-7d04-9046-376e205da994" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e89fe-1bfd-76eb-b4c2-6de4c12b65ea" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019e89fe-1bfd-7d04-9046-376e205da994" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workday.com/role/DerivativeInstrumentsScheduleofFairValuesofOutstandingDerivativeInstrumentsDetails_1" xlink:type="simple" xlink:href="wday-20260731.xsd#DerivativeInstrumentsScheduleofFairValuesofOutstandingDerivativeInstrumentsDetails_1"/>
  <link:definitionLink xlink:role="http://www.workday.com/role/DerivativeInstrumentsScheduleofFairValuesofOutstandingDerivativeInstrumentsDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativesFairValueLineItems_019e89fe-1bfd-76eb-b4c2-6de4c12b65ea" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativesFairValueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e89fe-1bfd-7f55-8cc1-01429970aeba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e89fe-1bfd-76eb-b4c2-6de4c12b65ea" xlink:to="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e89fe-1bfd-7f55-8cc1-01429970aeba" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e89fe-1bfd-7e6c-b1c5-7fb8144b6629" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e89fe-1bfd-7f55-8cc1-01429970aeba" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e89fe-1bfd-7e6c-b1c5-7fb8144b6629" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_019e89fe-1bfd-7e6c-b1c5-7fb8144b6629_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e89fe-1bfd-7e6c-b1c5-7fb8144b6629" xlink:to="loc_us-gaap_HedgingRelationshipDomain_019e89fe-1bfd-7e6c-b1c5-7fb8144b6629_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_019e89fe-1bfd-74f2-864e-ec719d771a8c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e89fe-1bfd-7e6c-b1c5-7fb8144b6629" xlink:to="loc_us-gaap_HedgingRelationshipDomain_019e89fe-1bfd-74f2-864e-ec719d771a8c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashFlowHedgingMember_019e89fe-1bfd-7280-9141-1c2ae15e67b8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashFlowHedgingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingRelationshipDomain_019e89fe-1bfd-74f2-864e-ec719d771a8c" xlink:to="loc_us-gaap_CashFlowHedgingMember_019e89fe-1bfd-7280-9141-1c2ae15e67b8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_019e89fe-1bfd-709d-bb7e-a06f26484988" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e89fe-1bfd-7f55-8cc1-01429970aeba" xlink:to="loc_us-gaap_HedgingDesignationAxis_019e89fe-1bfd-709d-bb7e-a06f26484988" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e89fe-1bfd-709d-bb7e-a06f26484988_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e89fe-1bfd-709d-bb7e-a06f26484988" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e89fe-1bfd-709d-bb7e-a06f26484988_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e89fe-1bfd-76c9-a8c1-dc6016f54053" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e89fe-1bfd-709d-bb7e-a06f26484988" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e89fe-1bfd-76c9-a8c1-dc6016f54053" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019e89fe-1bfd-77a7-9cd2-20e1a08b3e80" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019e89fe-1bfd-76c9-a8c1-dc6016f54053" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019e89fe-1bfd-77a7-9cd2-20e1a08b3e80" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_019e89fe-1bfd-775b-8fcf-b079226009e5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019e89fe-1bfd-76c9-a8c1-dc6016f54053" xlink:to="loc_us-gaap_NondesignatedMember_019e89fe-1bfd-775b-8fcf-b079226009e5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e89fe-1bfd-7c22-9fb3-8db933172b9b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e89fe-1bfd-76eb-b4c2-6de4c12b65ea" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e89fe-1bfd-7c22-9fb3-8db933172b9b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019e89fe-1bfd-7d04-9046-376e205da994" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e89fe-1bfd-76eb-b4c2-6de4c12b65ea" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019e89fe-1bfd-7d04-9046-376e205da994" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workday.com/role/DerivativeInstrumentsScheduleofEffectofCashFlowHedgesonIncomeStatementDetails" xlink:type="simple" xlink:href="wday-20260731.xsd#DerivativeInstrumentsScheduleofEffectofCashFlowHedgesonIncomeStatementDetails"/>
  <link:definitionLink xlink:role="http://www.workday.com/role/DerivativeInstrumentsScheduleofEffectofCashFlowHedgesonIncomeStatementDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89fe-1bfd-742a-8c65-03d19fd246eb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e89fe-1bfd-7a1e-a79f-20f40ba2095d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89fe-1bfd-742a-8c65-03d19fd246eb" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e89fe-1bfd-7a1e-a79f-20f40ba2095d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfIncomeLocationBalanceAxis_019e89fe-1bfd-7054-8e5a-d6638d85145d" 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_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e89fe-1bfd-7a1e-a79f-20f40ba2095d" xlink:to="loc_us-gaap_StatementOfIncomeLocationBalanceAxis_019e89fe-1bfd-7054-8e5a-d6638d85145d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e89fe-1bfd-73c5-83aa-8b4eae23325b" 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_DerivativeInstrumentsGainLossLineItems_019e89fe-1bfd-742a-8c65-03d19fd246eb" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e89fe-1bfd-73c5-83aa-8b4eae23325b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_019e89fe-1bfd-71c3-a07e-80474b86c570" 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_DerivativeInstrumentsGainLossLineItems_019e89fe-1bfd-742a-8c65-03d19fd246eb" xlink:to="loc_us-gaap_OperatingExpenses_019e89fe-1bfd-71c3-a07e-80474b86c570" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax_019e89fe-1bfd-72af-8995-022f8fba4e2b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89fe-1bfd-742a-8c65-03d19fd246eb" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax_019e89fe-1bfd-72af-8995-022f8fba4e2b" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workday.com/role/DerivativeInstrumentsScheduleofEffectofCashFlowHedgesonIncomeStatementDetails_1" xlink:type="simple" xlink:href="wday-20260731.xsd#DerivativeInstrumentsScheduleofEffectofCashFlowHedgesonIncomeStatementDetails_1"/>
  <link:definitionLink xlink:role="http://www.workday.com/role/DerivativeInstrumentsScheduleofEffectofCashFlowHedgesonIncomeStatementDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89fe-1bfd-742a-8c65-03d19fd246eb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e89fe-1bfd-7a1e-a79f-20f40ba2095d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89fe-1bfd-742a-8c65-03d19fd246eb" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e89fe-1bfd-7a1e-a79f-20f40ba2095d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e89fe-1bfd-73c5-83aa-8b4eae23325b" 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_DerivativeInstrumentsGainLossLineItems_019e89fe-1bfd-742a-8c65-03d19fd246eb" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e89fe-1bfd-73c5-83aa-8b4eae23325b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_019e89fe-1bfd-71c3-a07e-80474b86c570" 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_DerivativeInstrumentsGainLossLineItems_019e89fe-1bfd-742a-8c65-03d19fd246eb" xlink:to="loc_us-gaap_OperatingExpenses_019e89fe-1bfd-71c3-a07e-80474b86c570" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax_019e89fe-1bfd-72af-8995-022f8fba4e2b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89fe-1bfd-742a-8c65-03d19fd246eb" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax_019e89fe-1bfd-72af-8995-022f8fba4e2b" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workday.com/role/DerivativeInstrumentsScheduleofPretaxGainsLossesAssociatedwithCashFlowHedgesDetails" xlink:type="simple" xlink:href="wday-20260731.xsd#DerivativeInstrumentsScheduleofPretaxGainsLossesAssociatedwithCashFlowHedgesDetails"/>
  <link:definitionLink xlink:role="http://www.workday.com/role/DerivativeInstrumentsScheduleofPretaxGainsLossesAssociatedwithCashFlowHedgesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89fe-1bfd-728c-84f4-17153e20d7eb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e89fe-1bfd-7e5e-bdaa-08387c0ad3eb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89fe-1bfd-728c-84f4-17153e20d7eb" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e89fe-1bfd-7e5e-bdaa-08387c0ad3eb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfIncomeLocationBalanceAxis_019e89fe-1bfd-742b-84b0-bd7543c107ec" 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_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e89fe-1bfd-7e5e-bdaa-08387c0ad3eb" xlink:to="loc_us-gaap_StatementOfIncomeLocationBalanceAxis_019e89fe-1bfd-742b-84b0-bd7543c107ec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax_019e89fe-1bfd-71c5-8495-23da94a8e2ba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89fe-1bfd-728c-84f4-17153e20d7eb" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax_019e89fe-1bfd-71c5-8495-23da94a8e2ba" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax_019e89fe-1bfd-7ea4-8069-8507eaea08be" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89fe-1bfd-728c-84f4-17153e20d7eb" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax_019e89fe-1bfd-7ea4-8069-8507eaea08be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments_019e89fe-1bfd-7175-a753-95a15e742361" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89fe-1bfd-728c-84f4-17153e20d7eb" xlink:to="loc_us-gaap_GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments_019e89fe-1bfd-7175-a753-95a15e742361" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workday.com/role/DerivativeInstrumentsScheduleofPretaxGainsLossesAssociatedwithCashFlowHedgesDetails_1" xlink:type="simple" xlink:href="wday-20260731.xsd#DerivativeInstrumentsScheduleofPretaxGainsLossesAssociatedwithCashFlowHedgesDetails_1"/>
  <link:definitionLink xlink:role="http://www.workday.com/role/DerivativeInstrumentsScheduleofPretaxGainsLossesAssociatedwithCashFlowHedgesDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89fe-1bfd-728c-84f4-17153e20d7eb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e89fe-1bfd-7e5e-bdaa-08387c0ad3eb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89fe-1bfd-728c-84f4-17153e20d7eb" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e89fe-1bfd-7e5e-bdaa-08387c0ad3eb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax_019e89fe-1bfd-71c5-8495-23da94a8e2ba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89fe-1bfd-728c-84f4-17153e20d7eb" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax_019e89fe-1bfd-71c5-8495-23da94a8e2ba" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax_019e89fe-1bfd-7ea4-8069-8507eaea08be" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89fe-1bfd-728c-84f4-17153e20d7eb" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax_019e89fe-1bfd-7ea4-8069-8507eaea08be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments_019e89fe-1bfd-7175-a753-95a15e742361" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89fe-1bfd-728c-84f4-17153e20d7eb" xlink:to="loc_us-gaap_GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments_019e89fe-1bfd-7175-a753-95a15e742361" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workday.com/role/DebtScheduleofOutstandingDebtDetails" xlink:type="simple" xlink:href="wday-20260731.xsd#DebtScheduleofOutstandingDebtDetails"/>
  <link:definitionLink xlink:role="http://www.workday.com/role/DebtScheduleofOutstandingDebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019e89fe-1bfd-7258-90a6-8b0daa471578" 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_019e89fe-1bfd-7830-afa1-a6f338dd24dd" 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_019e89fe-1bfd-7258-90a6-8b0daa471578" xlink:to="loc_us-gaap_DebtInstrumentTable_019e89fe-1bfd-7830-afa1-a6f338dd24dd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019e89fe-1bfd-7785-8860-e878dfe010e4" 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_019e89fe-1bfd-7830-afa1-a6f338dd24dd" xlink:to="loc_us-gaap_DebtInstrumentAxis_019e89fe-1bfd-7785-8860-e878dfe010e4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e89fe-1bfd-7785-8860-e878dfe010e4_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_019e89fe-1bfd-7785-8860-e878dfe010e4" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e89fe-1bfd-7785-8860-e878dfe010e4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e89fe-1bfd-7cfa-9441-d1b08a8965f3" 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_019e89fe-1bfd-7785-8860-e878dfe010e4" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e89fe-1bfd-7cfa-9441-d1b08a8965f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_TwoThousandAndTwentySevenSeniorNotesMember_019e89fe-1bfd-758f-81e1-8a3d23ae1d9b" xlink:href="wday-20260731.xsd#wday_TwoThousandAndTwentySevenSeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e89fe-1bfd-7cfa-9441-d1b08a8965f3" xlink:to="loc_wday_TwoThousandAndTwentySevenSeniorNotesMember_019e89fe-1bfd-758f-81e1-8a3d23ae1d9b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_TwoThousandAndTwentyNineSeniorNotesMember_019e89fe-1bfd-7b6c-b6a9-fe9ab919e93d" xlink:href="wday-20260731.xsd#wday_TwoThousandAndTwentyNineSeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e89fe-1bfd-7cfa-9441-d1b08a8965f3" xlink:to="loc_wday_TwoThousandAndTwentyNineSeniorNotesMember_019e89fe-1bfd-7b6c-b6a9-fe9ab919e93d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_TwoThousandAndThirtyTwoSeniorNotesMember_019e89fe-1bfd-7476-bced-1f416742777f" xlink:href="wday-20260731.xsd#wday_TwoThousandAndThirtyTwoSeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e89fe-1bfd-7cfa-9441-d1b08a8965f3" xlink:to="loc_wday_TwoThousandAndThirtyTwoSeniorNotesMember_019e89fe-1bfd-7476-bced-1f416742777f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_019e89fe-1bfd-74cf-9e18-2112d4792792" 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_019e89fe-1bfd-7258-90a6-8b0daa471578" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_019e89fe-1bfd-74cf-9e18-2112d4792792" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_019e89fe-1bfd-7ded-a6e1-1bf88d9b600c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e89fe-1bfd-7258-90a6-8b0daa471578" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_019e89fe-1bfd-7ded-a6e1-1bf88d9b600c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_019e89fe-1bfd-7913-81d3-0ca7ce2c0056" 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_019e89fe-1bfd-7258-90a6-8b0daa471578" xlink:to="loc_us-gaap_LongTermDebt_019e89fe-1bfd-7913-81d3-0ca7ce2c0056" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_019e89fe-1bfd-7765-9871-24fff6b95537" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e89fe-1bfd-7258-90a6-8b0daa471578" xlink:to="loc_us-gaap_LongTermDebtCurrent_019e89fe-1bfd-7765-9871-24fff6b95537" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_019e89fe-1bfd-7a3c-b3cd-f13af97323b6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e89fe-1bfd-7258-90a6-8b0daa471578" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_019e89fe-1bfd-7a3c-b3cd-f13af97323b6" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workday.com/role/DebtScheduleofMaturitiesofLongtermDebtDetails" xlink:type="simple" xlink:href="wday-20260731.xsd#DebtScheduleofMaturitiesofLongtermDebtDetails"/>
  <link:definitionLink xlink:role="http://www.workday.com/role/DebtScheduleofMaturitiesofLongtermDebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019e89fe-1bfd-7dfe-86f3-c3f26a186b6e" 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_019e89fe-1bfd-760e-b39f-87bb84b50293" 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_019e89fe-1bfd-7dfe-86f3-c3f26a186b6e" xlink:to="loc_us-gaap_DebtInstrumentTable_019e89fe-1bfd-760e-b39f-87bb84b50293" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019e89fe-1bfd-7ccc-a700-2e679e7579ad" 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_019e89fe-1bfd-760e-b39f-87bb84b50293" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019e89fe-1bfd-7ccc-a700-2e679e7579ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019e89fe-1bfd-7ccc-a700-2e679e7579ad_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_019e89fe-1bfd-7ccc-a700-2e679e7579ad" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019e89fe-1bfd-7ccc-a700-2e679e7579ad_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019e89fe-1bfd-7145-a338-7282de9bc0fb" 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_019e89fe-1bfd-7ccc-a700-2e679e7579ad" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019e89fe-1bfd-7145-a338-7282de9bc0fb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_019e89fe-1bfd-75aa-8c82-7c67a9c0ebe7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019e89fe-1bfd-7145-a338-7282de9bc0fb" xlink:to="loc_us-gaap_SeniorNotesMember_019e89fe-1bfd-75aa-8c82-7c67a9c0ebe7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtByMaturityAbstract_019e89fe-1bfd-7adb-aea1-c9df68422642" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtByMaturityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e89fe-1bfd-7dfe-86f3-c3f26a186b6e" xlink:to="loc_us-gaap_LongTermDebtByMaturityAbstract_019e89fe-1bfd-7adb-aea1-c9df68422642" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear_019e89fe-1bfd-7165-9977-768f2fadc39d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermDebtByMaturityAbstract_019e89fe-1bfd-7adb-aea1-c9df68422642" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear_019e89fe-1bfd-7165-9977-768f2fadc39d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_019e89fe-1bfd-7e36-be29-1b3f68955e09" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermDebtByMaturityAbstract_019e89fe-1bfd-7adb-aea1-c9df68422642" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_019e89fe-1bfd-7e36-be29-1b3f68955e09" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_019e89fe-1bfd-7fd4-ad17-8a3937e7448d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermDebtByMaturityAbstract_019e89fe-1bfd-7adb-aea1-c9df68422642" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_019e89fe-1bfd-7fd4-ad17-8a3937e7448d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_019e89fe-1bfd-7733-ae5e-9fedd2af7a04" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermDebtByMaturityAbstract_019e89fe-1bfd-7adb-aea1-c9df68422642" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_019e89fe-1bfd-7733-ae5e-9fedd2af7a04" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_019e89fe-1bfd-767a-bb3c-daa171c0ab78" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermDebtByMaturityAbstract_019e89fe-1bfd-7adb-aea1-c9df68422642" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_019e89fe-1bfd-767a-bb3c-daa171c0ab78" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_LongTermDebtMaturityAfterYearFour_019e89fe-1bfd-7302-81fb-86fdad11335d" xlink:href="wday-20260731.xsd#wday_LongTermDebtMaturityAfterYearFour"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermDebtByMaturityAbstract_019e89fe-1bfd-7adb-aea1-c9df68422642" xlink:to="loc_wday_LongTermDebtMaturityAfterYearFour_019e89fe-1bfd-7302-81fb-86fdad11335d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_019e89fe-1bfd-712c-9fff-075733043307" 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_LongTermDebtByMaturityAbstract_019e89fe-1bfd-7adb-aea1-c9df68422642" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_019e89fe-1bfd-712c-9fff-075733043307" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workday.com/role/DebtNarrativeDetails" xlink:type="simple" xlink:href="wday-20260731.xsd#DebtNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.workday.com/role/DebtNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019e89fe-1bfd-7917-aaf9-4926a7c59606" 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_019e89fe-1bfd-70b3-bd44-7b453400cdb1" 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_019e89fe-1bfd-7917-aaf9-4926a7c59606" xlink:to="loc_us-gaap_DebtInstrumentTable_019e89fe-1bfd-70b3-bd44-7b453400cdb1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019e89fe-1bfd-77e8-b0d0-ae41879496e4" 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_019e89fe-1bfd-70b3-bd44-7b453400cdb1" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019e89fe-1bfd-77e8-b0d0-ae41879496e4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019e89fe-1bfd-77e8-b0d0-ae41879496e4_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_019e89fe-1bfd-77e8-b0d0-ae41879496e4" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019e89fe-1bfd-77e8-b0d0-ae41879496e4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019e89fe-1bfd-7968-93ee-d6b0a8d10c63" 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_019e89fe-1bfd-77e8-b0d0-ae41879496e4" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019e89fe-1bfd-7968-93ee-d6b0a8d10c63" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_019e89fe-1bfd-7c3f-aa8f-812fb51b52d4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019e89fe-1bfd-7968-93ee-d6b0a8d10c63" xlink:to="loc_us-gaap_SeniorNotesMember_019e89fe-1bfd-7c3f-aa8f-812fb51b52d4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019e89fe-1bfd-7249-b12a-be14eac8db47" 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_019e89fe-1bfd-70b3-bd44-7b453400cdb1" xlink:to="loc_us-gaap_DebtInstrumentAxis_019e89fe-1bfd-7249-b12a-be14eac8db47" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e89fe-1bfd-7249-b12a-be14eac8db47_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_019e89fe-1bfd-7249-b12a-be14eac8db47" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e89fe-1bfd-7249-b12a-be14eac8db47_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e89fe-1bfd-788a-89de-12cd145d6fbd" 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_019e89fe-1bfd-7249-b12a-be14eac8db47" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e89fe-1bfd-788a-89de-12cd145d6fbd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_TwoThousandAndTwentySevenSeniorNotesMember_019e89fe-1bfd-7637-b2ae-72a05787f27e" xlink:href="wday-20260731.xsd#wday_TwoThousandAndTwentySevenSeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e89fe-1bfd-788a-89de-12cd145d6fbd" xlink:to="loc_wday_TwoThousandAndTwentySevenSeniorNotesMember_019e89fe-1bfd-7637-b2ae-72a05787f27e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_TwoThousandAndTwentyNineSeniorNotesMember_019e89fe-1bfd-7846-ae60-310538085860" xlink:href="wday-20260731.xsd#wday_TwoThousandAndTwentyNineSeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e89fe-1bfd-788a-89de-12cd145d6fbd" xlink:to="loc_wday_TwoThousandAndTwentyNineSeniorNotesMember_019e89fe-1bfd-7846-ae60-310538085860" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_TwoThousandAndThirtyTwoSeniorNotesMember_019e89fe-1bfd-7541-bbe7-e2fc626d1891" xlink:href="wday-20260731.xsd#wday_TwoThousandAndThirtyTwoSeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e89fe-1bfd-788a-89de-12cd145d6fbd" xlink:to="loc_wday_TwoThousandAndThirtyTwoSeniorNotesMember_019e89fe-1bfd-7541-bbe7-e2fc626d1891" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_TwoThousandTwentyTwoCreditAgreementMember_019e89fe-1bfd-7505-80e5-7a561ec28f4b" xlink:href="wday-20260731.xsd#wday_TwoThousandTwentyTwoCreditAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e89fe-1bfd-788a-89de-12cd145d6fbd" xlink:to="loc_wday_TwoThousandTwentyTwoCreditAgreementMember_019e89fe-1bfd-7505-80e5-7a561ec28f4b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019e89fe-1bfd-7870-b340-26c03e474e94" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e89fe-1bfd-70b3-bd44-7b453400cdb1" xlink:to="loc_us-gaap_CreditFacilityAxis_019e89fe-1bfd-7870-b340-26c03e474e94" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019e89fe-1bfd-7870-b340-26c03e474e94_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_019e89fe-1bfd-7870-b340-26c03e474e94" xlink:to="loc_us-gaap_CreditFacilityDomain_019e89fe-1bfd-7870-b340-26c03e474e94_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019e89fe-1bfd-72cb-8d9f-1698d6204311" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_019e89fe-1bfd-7870-b340-26c03e474e94" xlink:to="loc_us-gaap_CreditFacilityDomain_019e89fe-1bfd-72cb-8d9f-1698d6204311" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_019e89fe-1bfd-7fbe-ab4b-0142ca087acb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019e89fe-1bfd-72cb-8d9f-1698d6204311" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_019e89fe-1bfd-7fbe-ab4b-0142ca087acb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019e89fe-1bfd-7644-9821-0078c555f780" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e89fe-1bfd-70b3-bd44-7b453400cdb1" xlink:to="loc_srt_RangeAxis_019e89fe-1bfd-7644-9821-0078c555f780" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e89fe-1bfd-7644-9821-0078c555f780_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019e89fe-1bfd-7644-9821-0078c555f780" xlink:to="loc_srt_RangeMember_019e89fe-1bfd-7644-9821-0078c555f780_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e89fe-1bfd-728e-ad80-a332f8b15909" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019e89fe-1bfd-7644-9821-0078c555f780" xlink:to="loc_srt_RangeMember_019e89fe-1bfd-728e-ad80-a332f8b15909" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019e89fe-1bfd-7089-90b5-87f0baf7ab1e" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e89fe-1bfd-728e-ad80-a332f8b15909" xlink:to="loc_srt_MinimumMember_019e89fe-1bfd-7089-90b5-87f0baf7ab1e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019e89fe-1bfd-7c41-bbed-875d2d6216b1" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e89fe-1bfd-728e-ad80-a332f8b15909" xlink:to="loc_srt_MaximumMember_019e89fe-1bfd-7c41-bbed-875d2d6216b1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_019e89fe-1bfd-7e00-bf4f-5612689e15fa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e89fe-1bfd-70b3-bd44-7b453400cdb1" xlink:to="loc_us-gaap_VariableRateAxis_019e89fe-1bfd-7e00-bf4f-5612689e15fa" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_019e89fe-1bfd-7e00-bf4f-5612689e15fa_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_019e89fe-1bfd-7e00-bf4f-5612689e15fa" xlink:to="loc_us-gaap_VariableRateDomain_019e89fe-1bfd-7e00-bf4f-5612689e15fa_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_019e89fe-1bfd-76c8-9477-bed0b626669e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_019e89fe-1bfd-7e00-bf4f-5612689e15fa" xlink:to="loc_us-gaap_VariableRateDomain_019e89fe-1bfd-76c8-9477-bed0b626669e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BaseRateMember_019e89fe-1bfd-71e3-9b34-0e815465450a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BaseRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_019e89fe-1bfd-76c8-9477-bed0b626669e" xlink:to="loc_us-gaap_BaseRateMember_019e89fe-1bfd-71e3-9b34-0e815465450a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredOvernightFinancingRateSofrMember_019e89fe-1bfd-70e7-9603-608b4a25856d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SecuredOvernightFinancingRateSofrMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_019e89fe-1bfd-76c8-9477-bed0b626669e" xlink:to="loc_us-gaap_SecuredOvernightFinancingRateSofrMember_019e89fe-1bfd-70e7-9603-608b4a25856d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_019e89fe-1bfd-785e-87cc-752affa19f6b" 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_019e89fe-1bfd-7917-aaf9-4926a7c59606" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_019e89fe-1bfd-785e-87cc-752affa19f6b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019e89fe-1bfd-76b7-8913-bd85f88fbaea" 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_019e89fe-1bfd-7917-aaf9-4926a7c59606" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019e89fe-1bfd-76b7-8913-bd85f88fbaea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_019e89fe-1bfd-7174-9d35-175cd22bd9f6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e89fe-1bfd-7917-aaf9-4926a7c59606" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_019e89fe-1bfd-7174-9d35-175cd22bd9f6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_019e89fe-1bfd-794b-a53b-3e75b4612a1c" 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_019e89fe-1bfd-7917-aaf9-4926a7c59606" xlink:to="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_019e89fe-1bfd-794b-a53b-3e75b4612a1c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFairValue_019e89fe-1bfd-7448-9c78-98ab5526a17b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e89fe-1bfd-7917-aaf9-4926a7c59606" xlink:to="loc_us-gaap_DebtInstrumentFairValue_019e89fe-1bfd-7448-9c78-98ab5526a17b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019e89fe-1bfd-737f-87d2-775861a34080" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e89fe-1bfd-7917-aaf9-4926a7c59606" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019e89fe-1bfd-737f-87d2-775861a34080" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_019e89fe-1bfd-7fbe-a7c0-98351cc0eaca" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e89fe-1bfd-7917-aaf9-4926a7c59606" xlink:to="loc_us-gaap_LineOfCredit_019e89fe-1bfd-7fbe-a7c0-98351cc0eaca" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019e89fe-1bfd-76de-ac10-a62ce46584fa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e89fe-1bfd-7917-aaf9-4926a7c59606" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019e89fe-1bfd-76de-ac10-a62ce46584fa" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_DebtInstrumentCovenantMaximumLeverageRatio_019e89fe-1bfd-7deb-ab01-1747f5f6f073" xlink:href="wday-20260731.xsd#wday_DebtInstrumentCovenantMaximumLeverageRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e89fe-1bfd-7917-aaf9-4926a7c59606" xlink:to="loc_wday_DebtInstrumentCovenantMaximumLeverageRatio_019e89fe-1bfd-7deb-ab01-1747f5f6f073" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_DebtInstrumentCovenantMaximumLeverageRatioStepUp_019e89fe-1bfd-7416-b165-3daa75bcf6be" xlink:href="wday-20260731.xsd#wday_DebtInstrumentCovenantMaximumLeverageRatioStepUp"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e89fe-1bfd-7917-aaf9-4926a7c59606" xlink:to="loc_wday_DebtInstrumentCovenantMaximumLeverageRatioStepUp_019e89fe-1bfd-7416-b165-3daa75bcf6be" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workday.com/role/StockholdersEquityNarrativeDetails" xlink:type="simple" xlink:href="wday-20260731.xsd#StockholdersEquityNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.workday.com/role/StockholdersEquityNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e89fe-1bfd-7b9f-8de0-700702ad21fb" 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_019e89fe-1bfd-784a-8328-4d7c1a6b8679" 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_019e89fe-1bfd-7b9f-8de0-700702ad21fb" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e89fe-1bfd-784a-8328-4d7c1a6b8679" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_01a023d3-66d7-7f90-9549-4eb1ef1e0608" 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_019e89fe-1bfd-784a-8328-4d7c1a6b8679" xlink:to="loc_us-gaap_StatementClassOfStockAxis_01a023d3-66d7-7f90-9549-4eb1ef1e0608" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_01a023d3-66d7-7f90-9549-4eb1ef1e0608_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_01a023d3-66d7-7f90-9549-4eb1ef1e0608" xlink:to="loc_us-gaap_ClassOfStockDomain_01a023d3-66d7-7f90-9549-4eb1ef1e0608_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_01a023d3-66d7-7c89-a506-1bf254918bb3" 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_01a023d3-66d7-7f90-9549-4eb1ef1e0608" xlink:to="loc_us-gaap_ClassOfStockDomain_01a023d3-66d7-7c89-a506-1bf254918bb3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_01a023d3-66d7-7bde-89e9-a1fc58bcd125" 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_01a023d3-66d7-7c89-a506-1bf254918bb3" xlink:to="loc_us-gaap_CommonClassAMember_01a023d3-66d7-7bde-89e9-a1fc58bcd125" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_01a023d3-66d7-7b5d-a25e-909f322ce437" 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_01a023d3-66d7-7c89-a506-1bf254918bb3" xlink:to="loc_us-gaap_CommonClassBMember_01a023d3-66d7-7b5d-a25e-909f322ce437" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_01a023d3-9fbc-7adc-bb4d-24d745a7ab0d" 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_019e89fe-1bfd-784a-8328-4d7c1a6b8679" xlink:to="loc_us-gaap_PlanNameAxis_01a023d3-9fbc-7adc-bb4d-24d745a7ab0d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_01a023d3-9fbc-7adc-bb4d-24d745a7ab0d_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_01a023d3-9fbc-7adc-bb4d-24d745a7ab0d" xlink:to="loc_us-gaap_PlanNameDomain_01a023d3-9fbc-7adc-bb4d-24d745a7ab0d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_01a023d3-9fbc-7c0d-8d2a-e01b9c742ca2" 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_01a023d3-9fbc-7adc-bb4d-24d745a7ab0d" xlink:to="loc_us-gaap_PlanNameDomain_01a023d3-9fbc-7c0d-8d2a-e01b9c742ca2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_August2026ShareRepurchaseProgramMember_01a023d3-9fbc-7089-868a-4150362d587f" xlink:href="wday-20260731.xsd#wday_August2026ShareRepurchaseProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_01a023d3-9fbc-7c0d-8d2a-e01b9c742ca2" xlink:to="loc_wday_August2026ShareRepurchaseProgramMember_01a023d3-9fbc-7089-868a-4150362d587f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_TwoThousandTwentyTwoEquityIncentivePlanMember_01a023d4-0f20-77ac-abdf-0e3811ec009e" xlink:href="wday-20260731.xsd#wday_TwoThousandTwentyTwoEquityIncentivePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_01a023d3-9fbc-7c0d-8d2a-e01b9c742ca2" xlink:to="loc_wday_TwoThousandTwentyTwoEquityIncentivePlanMember_01a023d4-0f20-77ac-abdf-0e3811ec009e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_EmployeeStockPurchasePlanMember_01a023d4-0f20-7133-94a7-d62293512c29" xlink:href="wday-20260731.xsd#wday_EmployeeStockPurchasePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_01a023d3-9fbc-7c0d-8d2a-e01b9c742ca2" xlink:to="loc_wday_EmployeeStockPurchasePlanMember_01a023d4-0f20-7133-94a7-d62293512c29" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_01a023d3-9fbc-7bb1-80f3-1fb359ba0844" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e89fe-1bfd-784a-8328-4d7c1a6b8679" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_01a023d3-9fbc-7bb1-80f3-1fb359ba0844" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_01a023d3-9fbc-7bb1-80f3-1fb359ba0844_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_01a023d3-9fbc-7bb1-80f3-1fb359ba0844" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_01a023d3-9fbc-7bb1-80f3-1fb359ba0844_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_01a023d3-9fbc-7ca3-a963-1a5f884e1962" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_01a023d3-9fbc-7bb1-80f3-1fb359ba0844" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_01a023d3-9fbc-7ca3-a963-1a5f884e1962" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_01a023d3-9fbc-7d4b-b8dd-b5ea4b022440" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_01a023d3-9fbc-7ca3-a963-1a5f884e1962" xlink:to="loc_us-gaap_SubsequentEventMember_01a023d3-9fbc-7d4b-b8dd-b5ea4b022440" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_01a023d4-0f20-7811-a54d-76503fba534c" 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_019e89fe-1bfd-784a-8328-4d7c1a6b8679" xlink:to="loc_us-gaap_AwardTypeAxis_01a023d4-0f20-7811-a54d-76503fba534c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_01a023d4-0f20-7811-a54d-76503fba534c_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_01a023d4-0f20-7811-a54d-76503fba534c" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_01a023d4-0f20-7811-a54d-76503fba534c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_01a023d4-0f20-7085-8f9e-debf69719c5a" 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_01a023d4-0f20-7811-a54d-76503fba534c" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_01a023d4-0f20-7085-8f9e-debf69719c5a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockMember_01a023d4-0f20-7d22-b8d0-d4a31fa4cc61" 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_01a023d4-0f20-7085-8f9e-debf69719c5a" xlink:to="loc_us-gaap_EmployeeStockMember_01a023d4-0f20-7d22-b8d0-d4a31fa4cc61" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_01a023d4-0f20-7340-ba9f-d6d343087401" 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_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_01a023d4-0f20-7085-8f9e-debf69719c5a" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_01a023d4-0f20-7340-ba9f-d6d343087401" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_RestrictedStockUnitsRSUsAndPerformanceBasedRestrictedStockUnitsPSUsMember_01a023d4-3b09-73c8-a2a7-fc2da1bf5ee5" xlink:href="wday-20260731.xsd#wday_RestrictedStockUnitsRSUsAndPerformanceBasedRestrictedStockUnitsPSUsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_01a023d4-0f20-7085-8f9e-debf69719c5a" xlink:to="loc_wday_RestrictedStockUnitsRSUsAndPerformanceBasedRestrictedStockUnitsPSUsMember_01a023d4-3b09-73c8-a2a7-fc2da1bf5ee5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_MarketBasedRestrictedStockUnitsMember_01a023d4-68be-784d-b33f-e84935769905" xlink:href="wday-20260731.xsd#wday_MarketBasedRestrictedStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_01a023d4-0f20-7085-8f9e-debf69719c5a" xlink:to="loc_wday_MarketBasedRestrictedStockUnitsMember_01a023d4-68be-784d-b33f-e84935769905" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualAxis_01a023d4-68be-7df8-9675-c9efbf7815b8" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_TitleOfIndividualAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e89fe-1bfd-784a-8328-4d7c1a6b8679" xlink:to="loc_srt_TitleOfIndividualAxis_01a023d4-68be-7df8-9675-c9efbf7815b8" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_01a023d4-68be-7df8-9675-c9efbf7815b8_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_TitleOfIndividualAxis_01a023d4-68be-7df8-9675-c9efbf7815b8" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_01a023d4-68be-7df8-9675-c9efbf7815b8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_01a023d4-68be-7ddf-9509-2795dc352308" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_TitleOfIndividualAxis_01a023d4-68be-7df8-9675-c9efbf7815b8" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_01a023d4-68be-7ddf-9509-2795dc352308" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ChiefExecutiveOfficerMember_01a023d4-68be-7cd3-a4f8-b9caca957a29" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ChiefExecutiveOfficerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_01a023d4-68be-7ddf-9509-2795dc352308" xlink:to="loc_srt_ChiefExecutiveOfficerMember_01a023d4-68be-7cd3-a4f8-b9caca957a29" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_01a023d3-66d7-753e-bc58-9128af159130" 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_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e89fe-1bfd-7b9f-8de0-700702ad21fb" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_01a023d3-66d7-753e-bc58-9128af159130" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_CommonStockVotingRightsVotesPerShare_01a023d3-66d7-7978-988f-a17c442ab34f" xlink:href="wday-20260731.xsd#wday_CommonStockVotingRightsVotesPerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e89fe-1bfd-7b9f-8de0-700702ad21fb" xlink:to="loc_wday_CommonStockVotingRightsVotesPerShare_01a023d3-66d7-7978-988f-a17c442ab34f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StockRepurchaseProgramAuthorizedAmount1_01a023d3-9fbc-77a2-a5b0-f17400f6b0f9" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_StockRepurchaseProgramAuthorizedAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e89fe-1bfd-7b9f-8de0-700702ad21fb" xlink:to="loc_srt_StockRepurchaseProgramAuthorizedAmount1_01a023d3-9fbc-77a2-a5b0-f17400f6b0f9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_CommonStockIncreaseDecreaseToCapitalSharesReservedForFutureIssuance_01a023d4-0f20-7e9f-bc3c-7fd75e64f536" xlink:href="wday-20260731.xsd#wday_CommonStockIncreaseDecreaseToCapitalSharesReservedForFutureIssuance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e89fe-1bfd-7b9f-8de0-700702ad21fb" xlink:to="loc_wday_CommonStockIncreaseDecreaseToCapitalSharesReservedForFutureIssuance_01a023d4-0f20-7e9f-bc3c-7fd75e64f536" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_01a023d4-0f20-751d-a943-102385e11c81" 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_019e89fe-1bfd-7b9f-8de0-700702ad21fb" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_01a023d4-0f20-751d-a943-102385e11c81" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent_01a023d4-0f20-7706-8eb8-aec7ccec4b7a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e89fe-1bfd-7b9f-8de0-700702ad21fb" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent_01a023d4-0f20-7706-8eb8-aec7ccec4b7a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_01a023d4-0f20-720e-aea9-97682206c008" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e89fe-1bfd-7b9f-8de0-700702ad21fb" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_01a023d4-0f20-720e-aea9-97682206c008" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions_01a023d4-3b09-70a6-bbc6-68ca1ecaf3b2" 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_019e89fe-1bfd-7b9f-8de0-700702ad21fb" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions_01a023d4-3b09-70a6-bbc6-68ca1ecaf3b2" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_01a023d4-3b09-73f3-8c02-b81a7be7da8d" 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_019e89fe-1bfd-7b9f-8de0-700702ad21fb" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_01a023d4-3b09-73f3-8c02-b81a7be7da8d" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_01a023d4-68be-7d89-982e-7c493ca37677" 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_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e89fe-1bfd-7b9f-8de0-700702ad21fb" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_01a023d4-68be-7d89-982e-7c493ca37677" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_01a023d4-68be-715c-809a-30238d86cf94" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e89fe-1bfd-7b9f-8de0-700702ad21fb" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_01a023d4-68be-715c-809a-30238d86cf94" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_01a023d4-68be-7c05-b5c0-de3f4bfd0760" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e89fe-1bfd-7b9f-8de0-700702ad21fb" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_01a023d4-68be-7c05-b5c0-de3f4bfd0760" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_01a023d4-68be-770e-8a73-ba88aaae6d26" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e89fe-1bfd-7b9f-8de0-700702ad21fb" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_01a023d4-68be-770e-8a73-ba88aaae6d26" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_01a023d4-68be-7c9e-81f4-0fecad4fddd8" 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_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e89fe-1bfd-7b9f-8de0-700702ad21fb" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_01a023d4-68be-7c9e-81f4-0fecad4fddd8" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1_01a023d4-68be-74b0-bb7c-090e2243ddd3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e89fe-1bfd-7b9f-8de0-700702ad21fb" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1_01a023d4-68be-74b0-bb7c-090e2243ddd3" xlink:type="arc" order="14"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workday.com/role/StockholdersEquityScheduleofShareRepurchaseProgramsAuthorizedDetails" xlink:type="simple" xlink:href="wday-20260731.xsd#StockholdersEquityScheduleofShareRepurchaseProgramsAuthorizedDetails"/>
  <link:definitionLink xlink:role="http://www.workday.com/role/StockholdersEquityScheduleofShareRepurchaseProgramsAuthorizedDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_srt_ShareRepurchaseProgramLineItems_019e89fe-1bfd-7163-96fe-0b06885273a9" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ShareRepurchaseProgramLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ShareRepurchaseProgramTable_019e89fe-1bfd-7b92-827c-20c427b8f732" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ShareRepurchaseProgramTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_srt_ShareRepurchaseProgramLineItems_019e89fe-1bfd-7163-96fe-0b06885273a9" xlink:to="loc_srt_ShareRepurchaseProgramTable_019e89fe-1bfd-7b92-827c-20c427b8f732" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_019e89fe-1bfd-7826-a1dd-904a8d949920" 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_srt_ShareRepurchaseProgramTable_019e89fe-1bfd-7b92-827c-20c427b8f732" xlink:to="loc_us-gaap_PlanNameAxis_019e89fe-1bfd-7826-a1dd-904a8d949920" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019e89fe-1bfd-7826-a1dd-904a8d949920_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_019e89fe-1bfd-7826-a1dd-904a8d949920" xlink:to="loc_us-gaap_PlanNameDomain_019e89fe-1bfd-7826-a1dd-904a8d949920_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019e89fe-1bfd-7118-9fde-47dc1c2ae799" 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_019e89fe-1bfd-7826-a1dd-904a8d949920" xlink:to="loc_us-gaap_PlanNameDomain_019e89fe-1bfd-7118-9fde-47dc1c2ae799" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_August2024ShareRepurchaseProgramMember_019e89fe-1bfd-7065-a2f3-04b8d72413f2" xlink:href="wday-20260731.xsd#wday_August2024ShareRepurchaseProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019e89fe-1bfd-7118-9fde-47dc1c2ae799" xlink:to="loc_wday_August2024ShareRepurchaseProgramMember_019e89fe-1bfd-7065-a2f3-04b8d72413f2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_May2025ShareRepurchaseProgramMember_019e89fe-1bfd-7b4d-b9cb-6ba54a00e1dd" xlink:href="wday-20260731.xsd#wday_May2025ShareRepurchaseProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019e89fe-1bfd-7118-9fde-47dc1c2ae799" xlink:to="loc_wday_May2025ShareRepurchaseProgramMember_019e89fe-1bfd-7b4d-b9cb-6ba54a00e1dd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_September2025ShareRepurchaseProgramMember_019e89fe-1bfd-7912-8997-651f1c17febd" xlink:href="wday-20260731.xsd#wday_September2025ShareRepurchaseProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019e89fe-1bfd-7118-9fde-47dc1c2ae799" xlink:to="loc_wday_September2025ShareRepurchaseProgramMember_019e89fe-1bfd-7912-8997-651f1c17febd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_August2026ShareRepurchaseProgramMember_01a0164b-8b0c-7e07-9500-9d94a1368b5e" xlink:href="wday-20260731.xsd#wday_August2026ShareRepurchaseProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019e89fe-1bfd-7118-9fde-47dc1c2ae799" xlink:to="loc_wday_August2026ShareRepurchaseProgramMember_01a0164b-8b0c-7e07-9500-9d94a1368b5e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StockRepurchaseProgramAuthorizedAmount1_019e89fe-1bfd-7470-9124-0ec6de140244" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_StockRepurchaseProgramAuthorizedAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ShareRepurchaseProgramLineItems_019e89fe-1bfd-7163-96fe-0b06885273a9" xlink:to="loc_srt_StockRepurchaseProgramAuthorizedAmount1_019e89fe-1bfd-7470-9124-0ec6de140244" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workday.com/role/StockholdersEquityScheduleofShareRepurchaseProgramDetails" xlink:type="simple" xlink:href="wday-20260731.xsd#StockholdersEquityScheduleofShareRepurchaseProgramDetails"/>
  <link:definitionLink xlink:role="http://www.workday.com/role/StockholdersEquityScheduleofShareRepurchaseProgramDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_srt_ShareRepurchaseProgramLineItems_019e89fe-1bfd-7819-ad04-c21f4f7477fa" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ShareRepurchaseProgramLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ShareRepurchaseProgramTable_019e89fe-1bfd-7bf4-a4e3-f0938761cda1" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ShareRepurchaseProgramTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_srt_ShareRepurchaseProgramLineItems_019e89fe-1bfd-7819-ad04-c21f4f7477fa" xlink:to="loc_srt_ShareRepurchaseProgramTable_019e89fe-1bfd-7bf4-a4e3-f0938761cda1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019e89fe-1bfd-7679-a255-3da0a837743a" 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_srt_ShareRepurchaseProgramTable_019e89fe-1bfd-7bf4-a4e3-f0938761cda1" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019e89fe-1bfd-7679-a255-3da0a837743a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019e89fe-1bfd-7679-a255-3da0a837743a_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_019e89fe-1bfd-7679-a255-3da0a837743a" xlink:to="loc_us-gaap_EquityComponentDomain_019e89fe-1bfd-7679-a255-3da0a837743a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019e89fe-1bfd-7254-a888-fc0be79c8230" 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_019e89fe-1bfd-7679-a255-3da0a837743a" xlink:to="loc_us-gaap_EquityComponentDomain_019e89fe-1bfd-7254-a888-fc0be79c8230" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019e89fe-1bfd-7272-8a4b-a2079937b8a5" 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_019e89fe-1bfd-7254-a888-fc0be79c8230" xlink:to="loc_us-gaap_CommonStockMember_019e89fe-1bfd-7272-8a4b-a2079937b8a5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockSharesAcquired_019e89fe-1bfd-711b-875f-68bca71e7c88" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TreasuryStockSharesAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ShareRepurchaseProgramLineItems_019e89fe-1bfd-7819-ad04-c21f4f7477fa" xlink:to="loc_us-gaap_TreasuryStockSharesAcquired_019e89fe-1bfd-711b-875f-68bca71e7c88" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockAcquiredAverageCostPerShare_019e89fe-1bfd-7fb8-aaa3-b2c8f1ec5e7c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TreasuryStockAcquiredAverageCostPerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ShareRepurchaseProgramLineItems_019e89fe-1bfd-7819-ad04-c21f4f7477fa" xlink:to="loc_us-gaap_TreasuryStockAcquiredAverageCostPerShare_019e89fe-1bfd-7fb8-aaa3-b2c8f1ec5e7c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_019e89fe-1bfd-7009-a9d6-042ac343af4c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ShareRepurchaseProgramLineItems_019e89fe-1bfd-7819-ad04-c21f4f7477fa" xlink:to="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_019e89fe-1bfd-7009-a9d6-042ac343af4c" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workday.com/role/StockholdersEquityScheduleofInformationRelatedtoRestrictedStockUnitsActivityDetails" xlink:type="simple" xlink:href="wday-20260731.xsd#StockholdersEquityScheduleofInformationRelatedtoRestrictedStockUnitsActivityDetails"/>
  <link:definitionLink xlink:role="http://www.workday.com/role/StockholdersEquityScheduleofInformationRelatedtoRestrictedStockUnitsActivityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e89fe-1bfd-7567-9782-d2318e3cc36a" 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_019e89fe-1bfd-74d5-acf4-5a6aa93e3206" 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_019e89fe-1bfd-7567-9782-d2318e3cc36a" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e89fe-1bfd-74d5-acf4-5a6aa93e3206" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019e89fe-1bfd-715d-8d40-076371ec17fc" 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_019e89fe-1bfd-74d5-acf4-5a6aa93e3206" xlink:to="loc_us-gaap_AwardTypeAxis_019e89fe-1bfd-715d-8d40-076371ec17fc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e89fe-1bfd-715d-8d40-076371ec17fc_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_019e89fe-1bfd-715d-8d40-076371ec17fc" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e89fe-1bfd-715d-8d40-076371ec17fc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e89fe-1bfd-7e26-9d2f-6bc035b6808f" 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_019e89fe-1bfd-715d-8d40-076371ec17fc" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e89fe-1bfd-7e26-9d2f-6bc035b6808f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_RestrictedStockUnitsRSUsAndPerformanceBasedRestrictedStockUnitsPSUsMember_019e89fe-1bfd-7438-bce3-1164d5004207" xlink:href="wday-20260731.xsd#wday_RestrictedStockUnitsRSUsAndPerformanceBasedRestrictedStockUnitsPSUsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e89fe-1bfd-7e26-9d2f-6bc035b6808f" xlink:to="loc_wday_RestrictedStockUnitsRSUsAndPerformanceBasedRestrictedStockUnitsPSUsMember_019e89fe-1bfd-7438-bce3-1164d5004207" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_019e89fe-1bfd-7f45-be7e-35f1c2bb74e7" 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_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e89fe-1bfd-7e26-9d2f-6bc035b6808f" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_019e89fe-1bfd-7f45-be7e-35f1c2bb74e7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_019e89fe-1bfd-7d25-8921-959787bbc10e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e89fe-1bfd-7e26-9d2f-6bc035b6808f" xlink:to="loc_us-gaap_PerformanceSharesMember_019e89fe-1bfd-7d25-8921-959787bbc10e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_ExecutivePerformanceSharesMember_019e89fe-1bfd-79f9-b32c-2c0ccb85a37b" xlink:href="wday-20260731.xsd#wday_ExecutivePerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e89fe-1bfd-7e26-9d2f-6bc035b6808f" xlink:to="loc_wday_ExecutivePerformanceSharesMember_019e89fe-1bfd-79f9-b32c-2c0ccb85a37b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019e89fe-1bfd-7d9b-a283-bdc6d91621c4" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e89fe-1bfd-74d5-acf4-5a6aa93e3206" xlink:to="loc_srt_RangeAxis_019e89fe-1bfd-7d9b-a283-bdc6d91621c4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e89fe-1bfd-7d9b-a283-bdc6d91621c4_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019e89fe-1bfd-7d9b-a283-bdc6d91621c4" xlink:to="loc_srt_RangeMember_019e89fe-1bfd-7d9b-a283-bdc6d91621c4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e89fe-1bfd-72f8-9bcb-a44dc992f468" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019e89fe-1bfd-7d9b-a283-bdc6d91621c4" xlink:to="loc_srt_RangeMember_019e89fe-1bfd-72f8-9bcb-a44dc992f468" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019e89fe-1bfd-7bfb-b10e-8c9f9c67dbe5" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e89fe-1bfd-72f8-9bcb-a44dc992f468" xlink:to="loc_srt_MinimumMember_019e89fe-1bfd-7bfb-b10e-8c9f9c67dbe5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019e89fe-1bfd-728e-9da0-e047d1dd709e" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e89fe-1bfd-72f8-9bcb-a44dc992f468" xlink:to="loc_srt_MaximumMember_019e89fe-1bfd-728e-9da0-e047d1dd709e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019e89fe-1bfd-7d46-b7a4-dae00a48cc34" 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_019e89fe-1bfd-7567-9782-d2318e3cc36a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019e89fe-1bfd-7d46-b7a4-dae00a48cc34" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019e89fe-1bfd-7023-bd6d-f09518c17f87" 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_019e89fe-1bfd-7d46-b7a4-dae00a48cc34" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019e89fe-1bfd-7023-bd6d-f09518c17f87" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019e89fe-1bfd-7a7e-81cf-88750a520441" 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_019e89fe-1bfd-7d46-b7a4-dae00a48cc34" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019e89fe-1bfd-7a7e-81cf-88750a520441" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_019e89fe-1bfd-7961-9d5b-80a4ce7fefa0" 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_019e89fe-1bfd-7d46-b7a4-dae00a48cc34" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_019e89fe-1bfd-7961-9d5b-80a4ce7fefa0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_019e89fe-1bfd-7c79-95b6-199638c013ba" 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_019e89fe-1bfd-7d46-b7a4-dae00a48cc34" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_019e89fe-1bfd-7c79-95b6-199638c013ba" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019e89fe-1bfd-7291-81bc-cf3a28098430" 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_019e89fe-1bfd-79af-b9cb-0fe979fbc251" 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_019e89fe-1bfd-7567-9782-d2318e3cc36a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019e89fe-1bfd-79af-b9cb-0fe979fbc251" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_019e89fe-1bfd-7e64-9c2f-087292c45928" 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_019e89fe-1bfd-79af-b9cb-0fe979fbc251" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_019e89fe-1bfd-7e64-9c2f-087292c45928" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019e89fe-1bfd-7cd4-adf1-70fa7c37a7e6" 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_019e89fe-1bfd-79af-b9cb-0fe979fbc251" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019e89fe-1bfd-7cd4-adf1-70fa7c37a7e6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_019e89fe-1bfd-751a-866f-a37ac3857562" 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_019e89fe-1bfd-79af-b9cb-0fe979fbc251" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_019e89fe-1bfd-751a-866f-a37ac3857562" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_019e89fe-1bfd-7d86-b2ba-de9b986d82d7" 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_019e89fe-1bfd-79af-b9cb-0fe979fbc251" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_019e89fe-1bfd-7d86-b2ba-de9b986d82d7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_019e89fe-1bfd-7f0e-a8fa-27d77af0520f" 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_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_019e89fe-1bfd-78d7-8b13-84137d6cd489" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e89fe-1bfd-7567-9782-d2318e3cc36a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_019e89fe-1bfd-78d7-8b13-84137d6cd489" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_019e89fe-1bfd-74f8-8399-6171088d8bde" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e89fe-1bfd-7567-9782-d2318e3cc36a" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_019e89fe-1bfd-74f8-8399-6171088d8bde" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workday.com/role/ContractBalancesandPerformanceObligationsScheduleofContractAssetsandUnearnedRevenueDetails" xlink:type="simple" xlink:href="wday-20260731.xsd#ContractBalancesandPerformanceObligationsScheduleofContractAssetsandUnearnedRevenueDetails"/>
  <link:definitionLink xlink:role="http://www.workday.com/role/ContractBalancesandPerformanceObligationsScheduleofContractAssetsandUnearnedRevenueDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019e89fe-1bfd-7886-9ea4-d7f58f650c9c" 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_019e89fe-1bfd-7e51-b0bb-a909605cff68" 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_019e89fe-1bfd-7886-9ea4-d7f58f650c9c" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019e89fe-1bfd-7e51-b0bb-a909605cff68" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019e89fe-1bfd-75e1-81fd-913fc039ab98" 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_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019e89fe-1bfd-7e51-b0bb-a909605cff68" xlink:to="loc_srt_ProductOrServiceAxis_019e89fe-1bfd-75e1-81fd-913fc039ab98" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019e89fe-1bfd-75e1-81fd-913fc039ab98_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_019e89fe-1bfd-75e1-81fd-913fc039ab98" xlink:to="loc_srt_ProductsAndServicesDomain_019e89fe-1bfd-75e1-81fd-913fc039ab98_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019e89fe-1bfd-77e4-aadb-0a62e7e3e814" 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_019e89fe-1bfd-75e1-81fd-913fc039ab98" xlink:to="loc_srt_ProductsAndServicesDomain_019e89fe-1bfd-77e4-aadb-0a62e7e3e814" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_ProfessionalServicesSubjectToCancellationAndProRatedRefundRightsMember_019e89fe-1bfd-79de-84ab-9dc66235ef31" xlink:href="wday-20260731.xsd#wday_ProfessionalServicesSubjectToCancellationAndProRatedRefundRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e89fe-1bfd-77e4-aadb-0a62e7e3e814" xlink:to="loc_wday_ProfessionalServicesSubjectToCancellationAndProRatedRefundRightsMember_019e89fe-1bfd-79de-84ab-9dc66235ef31" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_ContractAssetAbstract_019e89fe-1bfd-75a2-99eb-9a04e1fbc65d" xlink:href="wday-20260731.xsd#wday_ContractAssetAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019e89fe-1bfd-7886-9ea4-d7f58f650c9c" xlink:to="loc_wday_ContractAssetAbstract_019e89fe-1bfd-75a2-99eb-9a04e1fbc65d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerAssetNetCurrent_019e89fe-1bfd-7a3c-80c4-94eb03e9af7c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerAssetNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wday_ContractAssetAbstract_019e89fe-1bfd-75a2-99eb-9a04e1fbc65d" xlink:to="loc_us-gaap_ContractWithCustomerAssetNetCurrent_019e89fe-1bfd-7a3c-80c4-94eb03e9af7c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerAssetNetNoncurrent_019e89fe-1bfd-7ca3-8307-cd804bf752cb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerAssetNetNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wday_ContractAssetAbstract_019e89fe-1bfd-75a2-99eb-9a04e1fbc65d" xlink:to="loc_us-gaap_ContractWithCustomerAssetNetNoncurrent_019e89fe-1bfd-7ca3-8307-cd804bf752cb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerAssetNet_019e89fe-1bfd-7317-95d5-83eeb093363f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerAssetNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wday_ContractAssetAbstract_019e89fe-1bfd-75a2-99eb-9a04e1fbc65d" xlink:to="loc_us-gaap_ContractWithCustomerAssetNet_019e89fe-1bfd-7317-95d5-83eeb093363f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityAbstract_019e89fe-1bfd-7d1a-a5b0-dbd2490fe6db" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerLiabilityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019e89fe-1bfd-7886-9ea4-d7f58f650c9c" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityAbstract_019e89fe-1bfd-7d1a-a5b0-dbd2490fe6db" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_019e89fe-1bfd-7085-af05-b852a16f4b57" 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_ContractWithCustomerLiabilityAbstract_019e89fe-1bfd-7d1a-a5b0-dbd2490fe6db" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_019e89fe-1bfd-7085-af05-b852a16f4b57" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_019e89fe-1bfd-75f4-b1ee-38d2c9d1e10b" 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_ContractWithCustomerLiabilityAbstract_019e89fe-1bfd-7d1a-a5b0-dbd2490fe6db" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_019e89fe-1bfd-75f4-b1ee-38d2c9d1e10b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiability_019e89fe-1bfd-7e43-abba-e2d7fef31e4e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ContractWithCustomerLiabilityAbstract_019e89fe-1bfd-7d1a-a5b0-dbd2490fe6db" xlink:to="loc_us-gaap_ContractWithCustomerLiability_019e89fe-1bfd-7e43-abba-e2d7fef31e4e" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workday.com/role/ContractBalancesandPerformanceObligationsNarrativeDetails" xlink:type="simple" xlink:href="wday-20260731.xsd#ContractBalancesandPerformanceObligationsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.workday.com/role/ContractBalancesandPerformanceObligationsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019e89fe-1bfd-7aa2-884e-1c68c7fb624e" 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_019e89fe-1bfd-7558-afd1-0c4f8d5c2782" 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_019e89fe-1bfd-7aa2-884e-1c68c7fb624e" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019e89fe-1bfd-7558-afd1-0c4f8d5c2782" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019e89fe-1bfd-7c61-95c9-491006e902c2" 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_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019e89fe-1bfd-7558-afd1-0c4f8d5c2782" xlink:to="loc_srt_ProductOrServiceAxis_019e89fe-1bfd-7c61-95c9-491006e902c2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019e89fe-1bfd-7c61-95c9-491006e902c2_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_019e89fe-1bfd-7c61-95c9-491006e902c2" xlink:to="loc_srt_ProductsAndServicesDomain_019e89fe-1bfd-7c61-95c9-491006e902c2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019e89fe-1bfd-744f-9127-9ee0bd355f85" 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_019e89fe-1bfd-7c61-95c9-491006e902c2" xlink:to="loc_srt_ProductsAndServicesDomain_019e89fe-1bfd-744f-9127-9ee0bd355f85" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_SubscriptionServicesMember_019e89fe-1bfd-769f-87f2-98b00ba0581a" xlink:href="wday-20260731.xsd#wday_SubscriptionServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e89fe-1bfd-744f-9127-9ee0bd355f85" xlink:to="loc_wday_SubscriptionServicesMember_019e89fe-1bfd-769f-87f2-98b00ba0581a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019e89fe-1bfd-71f0-b06d-8dbb8a51e07d" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019e89fe-1bfd-7558-afd1-0c4f8d5c2782" xlink:to="loc_srt_RangeAxis_019e89fe-1bfd-71f0-b06d-8dbb8a51e07d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e89fe-1bfd-71f0-b06d-8dbb8a51e07d_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019e89fe-1bfd-71f0-b06d-8dbb8a51e07d" xlink:to="loc_srt_RangeMember_019e89fe-1bfd-71f0-b06d-8dbb8a51e07d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e89fe-1bfd-788e-a517-d4853ee0e3cf" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019e89fe-1bfd-71f0-b06d-8dbb8a51e07d" xlink:to="loc_srt_RangeMember_019e89fe-1bfd-788e-a517-d4853ee0e3cf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019e89fe-1bfd-7a7d-bd21-fec3485557c0" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e89fe-1bfd-788e-a517-d4853ee0e3cf" xlink:to="loc_srt_MinimumMember_019e89fe-1bfd-7a7d-bd21-fec3485557c0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019e89fe-1bfd-73c7-9dea-9d437fddf2d6" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e89fe-1bfd-788e-a517-d4853ee0e3cf" xlink:to="loc_srt_MaximumMember_019e89fe-1bfd-73c7-9dea-9d437fddf2d6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_019e89fe-1bfd-7bae-9775-b7a043fdb23b" 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_019e89fe-1bfd-7558-afd1-0c4f8d5c2782" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_019e89fe-1bfd-7bae-9775-b7a043fdb23b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_019e89fe-1bfd-71c6-ac30-a5705152d169" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerLiabilityRevenueRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019e89fe-1bfd-7aa2-884e-1c68c7fb624e" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_019e89fe-1bfd-71c6-ac30-a5705152d169" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_019e89fe-1bfd-7a52-81db-f1132819db1a" 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_019e89fe-1bfd-7aa2-884e-1c68c7fb624e" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_019e89fe-1bfd-7a52-81db-f1132819db1a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019e89fe-1bfd-75a7-a0dd-a01c5ffa91c1" 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_019e89fe-1bfd-7aa2-884e-1c68c7fb624e" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019e89fe-1bfd-75a7-a0dd-a01c5ffa91c1" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workday.com/role/ContractBalancesandPerformanceObligationsNarrativeDetails_1" xlink:type="simple" xlink:href="wday-20260731.xsd#ContractBalancesandPerformanceObligationsNarrativeDetails_1"/>
  <link:definitionLink xlink:role="http://www.workday.com/role/ContractBalancesandPerformanceObligationsNarrativeDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019e89fe-1bfd-7aa2-884e-1c68c7fb624e" 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_019e89fe-1bfd-7558-afd1-0c4f8d5c2782" 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_019e89fe-1bfd-7aa2-884e-1c68c7fb624e" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019e89fe-1bfd-7558-afd1-0c4f8d5c2782" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019e89fe-1bfd-7c61-95c9-491006e902c2" 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_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019e89fe-1bfd-7558-afd1-0c4f8d5c2782" xlink:to="loc_srt_ProductOrServiceAxis_019e89fe-1bfd-7c61-95c9-491006e902c2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019e89fe-1bfd-7c61-95c9-491006e902c2_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_019e89fe-1bfd-7c61-95c9-491006e902c2" xlink:to="loc_srt_ProductsAndServicesDomain_019e89fe-1bfd-7c61-95c9-491006e902c2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019e89fe-1bfd-744f-9127-9ee0bd355f85" 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_019e89fe-1bfd-7c61-95c9-491006e902c2" xlink:to="loc_srt_ProductsAndServicesDomain_019e89fe-1bfd-744f-9127-9ee0bd355f85" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_SubscriptionServicesMember_019e89fe-1bfd-769f-87f2-98b00ba0581a" xlink:href="wday-20260731.xsd#wday_SubscriptionServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e89fe-1bfd-744f-9127-9ee0bd355f85" xlink:to="loc_wday_SubscriptionServicesMember_019e89fe-1bfd-769f-87f2-98b00ba0581a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019e89fe-1bfd-71f0-b06d-8dbb8a51e07d" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019e89fe-1bfd-7558-afd1-0c4f8d5c2782" xlink:to="loc_srt_RangeAxis_019e89fe-1bfd-71f0-b06d-8dbb8a51e07d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e89fe-1bfd-71f0-b06d-8dbb8a51e07d_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019e89fe-1bfd-71f0-b06d-8dbb8a51e07d" xlink:to="loc_srt_RangeMember_019e89fe-1bfd-71f0-b06d-8dbb8a51e07d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e89fe-1bfd-788e-a517-d4853ee0e3cf" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019e89fe-1bfd-71f0-b06d-8dbb8a51e07d" xlink:to="loc_srt_RangeMember_019e89fe-1bfd-788e-a517-d4853ee0e3cf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019e89fe-1bfd-7a7d-bd21-fec3485557c0" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e89fe-1bfd-788e-a517-d4853ee0e3cf" xlink:to="loc_srt_MinimumMember_019e89fe-1bfd-7a7d-bd21-fec3485557c0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019e89fe-1bfd-73c7-9dea-9d437fddf2d6" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e89fe-1bfd-788e-a517-d4853ee0e3cf" xlink:to="loc_srt_MaximumMember_019e89fe-1bfd-73c7-9dea-9d437fddf2d6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_019e89fe-1bfd-71c6-ac30-a5705152d169" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerLiabilityRevenueRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019e89fe-1bfd-7aa2-884e-1c68c7fb624e" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_019e89fe-1bfd-71c6-ac30-a5705152d169" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_019e89fe-1bfd-7a52-81db-f1132819db1a" 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_019e89fe-1bfd-7aa2-884e-1c68c7fb624e" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_019e89fe-1bfd-7a52-81db-f1132819db1a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019e89fe-1bfd-75a7-a0dd-a01c5ffa91c1" 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_019e89fe-1bfd-7aa2-884e-1c68c7fb624e" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019e89fe-1bfd-75a7-a0dd-a01c5ffa91c1" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workday.com/role/NetIncomePerShareScheduleofComputationofDilutedNetIncomePerShareDetails" xlink:type="simple" xlink:href="wday-20260731.xsd#NetIncomePerShareScheduleofComputationofDilutedNetIncomePerShareDetails"/>
  <link:definitionLink xlink:role="http://www.workday.com/role/NetIncomePerShareScheduleofComputationofDilutedNetIncomePerShareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019e89fe-1bfd-7276-9eec-8dce87fbaa19" 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_019e89fe-1bfd-7c80-99dc-499ead59aaab" 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_019e89fe-1bfd-7276-9eec-8dce87fbaa19" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019e89fe-1bfd-7c80-99dc-499ead59aaab" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019e89fe-1bfd-7975-b0dc-cd1afee8d56f" 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_019e89fe-1bfd-7c80-99dc-499ead59aaab" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019e89fe-1bfd-7975-b0dc-cd1afee8d56f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019e89fe-1bfd-7975-b0dc-cd1afee8d56f_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_019e89fe-1bfd-7975-b0dc-cd1afee8d56f" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019e89fe-1bfd-7975-b0dc-cd1afee8d56f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019e89fe-1bfd-7fb2-84d2-0a0e638098ad" 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_019e89fe-1bfd-7975-b0dc-cd1afee8d56f" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019e89fe-1bfd-7fb2-84d2-0a0e638098ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockCompensationPlanMember_019e89fe-1bfd-7cca-a422-3a986997147d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockCompensationPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019e89fe-1bfd-7fb2-84d2-0a0e638098ad" xlink:to="loc_us-gaap_StockCompensationPlanMember_019e89fe-1bfd-7cca-a422-3a986997147d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_019e89fe-1bfd-7fac-adbe-18b7ae730864" 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_019e89fe-1bfd-7276-9eec-8dce87fbaa19" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_019e89fe-1bfd-7fac-adbe-18b7ae730864" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workday.com/role/GeographicInformationScheduleofRevenuesbyGeographicAreaDetails" xlink:type="simple" xlink:href="wday-20260731.xsd#GeographicInformationScheduleofRevenuesbyGeographicAreaDetails"/>
  <link:definitionLink xlink:role="http://www.workday.com/role/GeographicInformationScheduleofRevenuesbyGeographicAreaDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_019e89fe-1bfd-7fbe-9013-0043891fafce" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_019e89fe-1bfd-7bc6-bc1f-2da8015c1aea" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019e89fe-1bfd-7fbe-9013-0043891fafce" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_019e89fe-1bfd-7bc6-bc1f-2da8015c1aea" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_019e89fe-1bfd-72a7-95f1-723063103626" 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_DisaggregationOfRevenueTable_019e89fe-1bfd-7bc6-bc1f-2da8015c1aea" xlink:to="loc_srt_StatementGeographicalAxis_019e89fe-1bfd-72a7-95f1-723063103626" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019e89fe-1bfd-72a7-95f1-723063103626_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_019e89fe-1bfd-72a7-95f1-723063103626" xlink:to="loc_srt_SegmentGeographicalDomain_019e89fe-1bfd-72a7-95f1-723063103626_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019e89fe-1bfd-7697-85ed-b7c54000c0a3" 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_019e89fe-1bfd-72a7-95f1-723063103626" xlink:to="loc_srt_SegmentGeographicalDomain_019e89fe-1bfd-7697-85ed-b7c54000c0a3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_019e89fe-1bfd-7ba0-a69d-d41dc9301e87" 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_019e89fe-1bfd-7697-85ed-b7c54000c0a3" xlink:to="loc_country_US_019e89fe-1bfd-7ba0-a69d-d41dc9301e87" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonUsMember_019e89fe-1bfd-7ffb-b125-8ced79380e1c" 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_019e89fe-1bfd-7697-85ed-b7c54000c0a3" xlink:to="loc_us-gaap_NonUsMember_019e89fe-1bfd-7ffb-b125-8ced79380e1c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_NumberOfPrimaryGeographicalMarkets_019e89fe-1bfd-702c-b3ef-318bbc8e4a24" xlink:href="wday-20260731.xsd#wday_NumberOfPrimaryGeographicalMarkets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019e89fe-1bfd-7fbe-9013-0043891fafce" xlink:to="loc_wday_NumberOfPrimaryGeographicalMarkets_019e89fe-1bfd-702c-b3ef-318bbc8e4a24" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e89fe-1bfd-7f37-b973-a695becf2331" 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_DisaggregationOfRevenueLineItems_019e89fe-1bfd-7fbe-9013-0043891fafce" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e89fe-1bfd-7f37-b973-a695becf2331" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workday.com/role/GeographicInformationScheduleofLonglivedAssetsbyGeographicAreasDetails" xlink:type="simple" xlink:href="wday-20260731.xsd#GeographicInformationScheduleofLonglivedAssetsbyGeographicAreasDetails"/>
  <link:definitionLink xlink:role="http://www.workday.com/role/GeographicInformationScheduleofLonglivedAssetsbyGeographicAreasDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_019e89fe-1bfd-7825-9e03-9cb40de2c10c" 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_019e89fe-1bfd-7fbe-a58d-f232b81507ee" 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_019e89fe-1bfd-7825-9e03-9cb40de2c10c" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_019e89fe-1bfd-7fbe-a58d-f232b81507ee" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_019e89fe-1bfd-71b1-a263-8061e22084a5" 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_019e89fe-1bfd-7fbe-a58d-f232b81507ee" xlink:to="loc_srt_StatementGeographicalAxis_019e89fe-1bfd-71b1-a263-8061e22084a5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019e89fe-1bfd-71b1-a263-8061e22084a5_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_019e89fe-1bfd-71b1-a263-8061e22084a5" xlink:to="loc_srt_SegmentGeographicalDomain_019e89fe-1bfd-71b1-a263-8061e22084a5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019e89fe-1bfd-7695-8126-5f86da3c5b56" 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_019e89fe-1bfd-71b1-a263-8061e22084a5" xlink:to="loc_srt_SegmentGeographicalDomain_019e89fe-1bfd-7695-8126-5f86da3c5b56" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_019e89fe-1bfd-7469-9b85-86cc89acb363" 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_019e89fe-1bfd-7695-8126-5f86da3c5b56" xlink:to="loc_country_US_019e89fe-1bfd-7469-9b85-86cc89acb363" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_IE_019e89fe-1bfd-733d-9ab1-79e825d261c6" xlink:href="https://xbrl.sec.gov/country/2026/country-2026.xsd#country_IE"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019e89fe-1bfd-7695-8126-5f86da3c5b56" xlink:to="loc_country_IE_019e89fe-1bfd-733d-9ab1-79e825d261c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonUsMember_019e89fe-1bfd-7b13-8ad8-7241bd7eef18" 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_019e89fe-1bfd-7695-8126-5f86da3c5b56" xlink:to="loc_us-gaap_NonUsMember_019e89fe-1bfd-7b13-8ad8-7241bd7eef18" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncurrentAssets_019e89fe-1bfd-76e5-b643-0aa168ad2f95" 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_019e89fe-1bfd-7825-9e03-9cb40de2c10c" xlink:to="loc_us-gaap_NoncurrentAssets_019e89fe-1bfd-76e5-b643-0aa168ad2f95" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workday.com/role/RestructuringDetails" xlink:type="simple" xlink:href="wday-20260731.xsd#RestructuringDetails"/>
  <link:definitionLink xlink:role="http://www.workday.com/role/RestructuringDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_019e89fe-1bfd-7c94-84ef-74f20d28f4dd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_019e89fe-1bfd-797c-856a-e8c3f4acd339" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_019e89fe-1bfd-7c94-84ef-74f20d28f4dd" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_019e89fe-1bfd-797c-856a-e8c3f4acd339" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanAxis_019e89fe-1bfd-790f-8f00-dbdd92b52914" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestructuringPlanAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_019e89fe-1bfd-797c-856a-e8c3f4acd339" xlink:to="loc_us-gaap_RestructuringPlanAxis_019e89fe-1bfd-790f-8f00-dbdd92b52914" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_019e89fe-1bfd-790f-8f00-dbdd92b52914_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringPlanAxis_019e89fe-1bfd-790f-8f00-dbdd92b52914" xlink:to="loc_us-gaap_RestructuringPlanDomain_019e89fe-1bfd-790f-8f00-dbdd92b52914_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_019e89fe-1bfd-71d3-a66c-e83d949a72a7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringPlanAxis_019e89fe-1bfd-790f-8f00-dbdd92b52914" xlink:to="loc_us-gaap_RestructuringPlanDomain_019e89fe-1bfd-71d3-a66c-e83d949a72a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_Fiscal2027RestructuringPlanMember_019e89fe-1bfd-7cff-ab65-b785450bb57a" xlink:href="wday-20260731.xsd#wday_Fiscal2027RestructuringPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_019e89fe-1bfd-71d3-a66c-e83d949a72a7" xlink:to="loc_wday_Fiscal2027RestructuringPlanMember_019e89fe-1bfd-7cff-ab65-b785450bb57a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_Fiscal2026RestructuringPlanMember_019e89fe-1bfd-7442-8471-a44f491ba111" xlink:href="wday-20260731.xsd#wday_Fiscal2026RestructuringPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_019e89fe-1bfd-71d3-a66c-e83d949a72a7" xlink:to="loc_wday_Fiscal2026RestructuringPlanMember_019e89fe-1bfd-7442-8471-a44f491ba111" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveAxis_019e89fe-1bfd-72cb-95b8-3f243f9d5f34" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestructuringCostAndReserveAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_019e89fe-1bfd-797c-856a-e8c3f4acd339" xlink:to="loc_us-gaap_RestructuringCostAndReserveAxis_019e89fe-1bfd-72cb-95b8-3f243f9d5f34" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_019e89fe-1bfd-72cb-95b8-3f243f9d5f34_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_019e89fe-1bfd-72cb-95b8-3f243f9d5f34" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_019e89fe-1bfd-72cb-95b8-3f243f9d5f34_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_019e89fe-1bfd-7410-93b5-33e7057b3623" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_019e89fe-1bfd-72cb-95b8-3f243f9d5f34" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_019e89fe-1bfd-7410-93b5-33e7057b3623" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_WorkforceReductionMember_019e89fe-1bfd-7130-86d6-32df945591b6" xlink:href="wday-20260731.xsd#wday_WorkforceReductionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_019e89fe-1bfd-7410-93b5-33e7057b3623" xlink:to="loc_wday_WorkforceReductionMember_019e89fe-1bfd-7130-86d6-32df945591b6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_OfficeSpaceReductionAndOtherLongLivedAssetsMember_019e89fe-1bfd-7d7e-8f95-fd1861d49bc4" xlink:href="wday-20260731.xsd#wday_OfficeSpaceReductionAndOtherLongLivedAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_019e89fe-1bfd-7410-93b5-33e7057b3623" xlink:to="loc_wday_OfficeSpaceReductionAndOtherLongLivedAssetsMember_019e89fe-1bfd-7d7e-8f95-fd1861d49bc4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminatedPeriodPercent_019e89fe-1bfd-7adc-b579-f2f7d241dcb0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminatedPeriodPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_019e89fe-1bfd-7c94-84ef-74f20d28f4dd" xlink:to="loc_us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminatedPeriodPercent_019e89fe-1bfd-7adc-b579-f2f7d241dcb0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserve_019e89fe-1bfd-7e31-964c-51d3a4ba8cc5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestructuringReserve"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_019e89fe-1bfd-7c94-84ef-74f20d28f4dd" xlink:to="loc_us-gaap_RestructuringReserve_019e89fe-1bfd-7e31-964c-51d3a4ba8cc5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringAndRelatedCostCostIncurredToDate1_019e89fe-1bfd-7f19-85c6-7126c62aada9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestructuringAndRelatedCostCostIncurredToDate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_019e89fe-1bfd-7c94-84ef-74f20d28f4dd" xlink:to="loc_us-gaap_RestructuringAndRelatedCostCostIncurredToDate1_019e89fe-1bfd-7f19-85c6-7126c62aada9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_019e89fe-1bfd-7d52-9f6f-93a7a402da07" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestructuringCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_019e89fe-1bfd-7c94-84ef-74f20d28f4dd" xlink:to="loc_us-gaap_RestructuringCharges_019e89fe-1bfd-7d52-9f6f-93a7a402da07" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.workday.com/role/SubsequentEventDetails" xlink:type="simple" xlink:href="wday-20260731.xsd#SubsequentEventDetails"/>
  <link:definitionLink xlink:role="http://www.workday.com/role/SubsequentEventDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventLineItems_019e89fe-1bfd-7bb6-8946-f88707f73e2a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTable_019e89fe-1bfd-7f38-a043-d1a11af0fef4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SubsequentEventLineItems_019e89fe-1bfd-7bb6-8946-f88707f73e2a" xlink:to="loc_us-gaap_SubsequentEventTable_019e89fe-1bfd-7f38-a043-d1a11af0fef4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_019e89fe-1bfd-7cc7-8ad9-5d02c0e6ccbc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_019e89fe-1bfd-7f38-a043-d1a11af0fef4" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_019e89fe-1bfd-7cc7-8ad9-5d02c0e6ccbc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019e89fe-1bfd-7cc7-8ad9-5d02c0e6ccbc_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_019e89fe-1bfd-7cc7-8ad9-5d02c0e6ccbc" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019e89fe-1bfd-7cc7-8ad9-5d02c0e6ccbc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019e89fe-1bfd-736c-8d24-c9227323d78f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_019e89fe-1bfd-7cc7-8ad9-5d02c0e6ccbc" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019e89fe-1bfd-736c-8d24-c9227323d78f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_019e89fe-1bfd-7013-b1f0-0eaa4608a616" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_019e89fe-1bfd-736c-8d24-c9227323d78f" xlink:to="loc_us-gaap_SubsequentEventMember_019e89fe-1bfd-7013-b1f0-0eaa4608a616" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_01a0164e-3c1f-7095-99b9-cca9c6de5a9d" 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_SubsequentEventTable_019e89fe-1bfd-7f38-a043-d1a11af0fef4" xlink:to="loc_us-gaap_PlanNameAxis_01a0164e-3c1f-7095-99b9-cca9c6de5a9d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_01a0164e-3c1f-7095-99b9-cca9c6de5a9d_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_01a0164e-3c1f-7095-99b9-cca9c6de5a9d" xlink:to="loc_us-gaap_PlanNameDomain_01a0164e-3c1f-7095-99b9-cca9c6de5a9d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_01a0164e-3c1f-7a1a-9887-c18dfb7bf86d" 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_01a0164e-3c1f-7095-99b9-cca9c6de5a9d" xlink:to="loc_us-gaap_PlanNameDomain_01a0164e-3c1f-7a1a-9887-c18dfb7bf86d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_August2026ShareRepurchaseProgramMember_01a0164e-3c1f-78b2-bb89-2d545f6818e8" xlink:href="wday-20260731.xsd#wday_August2026ShareRepurchaseProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_01a0164e-3c1f-7a1a-9887-c18dfb7bf86d" xlink:to="loc_wday_August2026ShareRepurchaseProgramMember_01a0164e-3c1f-78b2-bb89-2d545f6818e8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StockRepurchaseProgramAuthorizedAmount1_01a0164e-3c1f-71f0-bf7a-aef4544c6a08" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_StockRepurchaseProgramAuthorizedAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_019e89fe-1bfd-7bb6-8946-f88707f73e2a" xlink:to="loc_srt_StockRepurchaseProgramAuthorizedAmount1_01a0164e-3c1f-71f0-bf7a-aef4544c6a08" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fasb.org/srt/role/srt-eedm/ExtensibleEnumerationLists" xlink:type="simple" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-roles-2026.xsd#eedm1"/>
  <link:definitionLink xlink:role="http://fasb.org/srt/role/srt-eedm/ExtensibleEnumerationLists" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent" 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_AssetsAbstract" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:type="arc" order="101"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://xbrl.sec.gov/ecd/role/IndividualsOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#IndividualsOnly"/>
  <link:definitionLink xlink:role="http://xbrl.sec.gov/ecd/role/IndividualsOnly" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AllIndividualsMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AllIndividualsMember"/>
    <link:loc xlink:type="locator" xlink:label="loc_wday_WayneA.I.FrederickMember_01a0013a-58b7-7e33-839f-70babdda3153" xlink:href="wday-20260731.xsd#wday_WayneA.I.FrederickMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ecd_AllIndividualsMember" xlink:to="loc_wday_WayneA.I.FrederickMember_01a0013a-58b7-7e33-839f-70babdda3153" xlink:type="arc" order="2"/>
  </link:definitionLink>
</link:linkbase>
