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

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2022 Workiva-->
<!--r:e50db280-4494-43f3-b721-e591ed3b4712,g:7ccbdbdb-6853-45dd-ae02-640d3d0811fe-->
<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://weedmaps.com/role/CoverPage" xlink:type="simple" xlink:href="maps-20220621.xsd#CoverPage"/>
  <link:definitionLink xlink:role="http://weedmaps.com/role/CoverPage" xlink:type="extended" id="i5ae9de07885048dcb35c31ffe05ee2ff_CoverPage">
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInformationLineItems_17b22a5d-614c-4c17-a5a5-d9e461f136a0" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_a23786af-f520-41f6-9c6f-81d726ba2933" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_17b22a5d-614c-4c17-a5a5-d9e461f136a0" xlink:to="loc_dei_DocumentType_a23786af-f520-41f6-9c6f-81d726ba2933" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_53a9a703-e12a-4d12-8506-668675cd5641" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_17b22a5d-614c-4c17-a5a5-d9e461f136a0" xlink:to="loc_dei_DocumentPeriodEndDate_53a9a703-e12a-4d12-8506-668675cd5641" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_48bf8065-975f-49d6-b37b-add8c79d7fce" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_17b22a5d-614c-4c17-a5a5-d9e461f136a0" xlink:to="loc_dei_EntityRegistrantName_48bf8065-975f-49d6-b37b-add8c79d7fce" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_421f474f-7579-4afb-b09e-a4bd5c7afb09" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_17b22a5d-614c-4c17-a5a5-d9e461f136a0" xlink:to="loc_dei_EntityIncorporationStateCountryCode_421f474f-7579-4afb-b09e-a4bd5c7afb09" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_a686c2ba-6801-4b55-ab10-77a6c226e4b1" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_17b22a5d-614c-4c17-a5a5-d9e461f136a0" xlink:to="loc_dei_EntityFileNumber_a686c2ba-6801-4b55-ab10-77a6c226e4b1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_b842433a-f584-4d89-918f-23e8c55f7222" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_17b22a5d-614c-4c17-a5a5-d9e461f136a0" xlink:to="loc_dei_EntityTaxIdentificationNumber_b842433a-f584-4d89-918f-23e8c55f7222" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_8190bc54-9514-4d2e-8848-38fb8006b3c4" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_17b22a5d-614c-4c17-a5a5-d9e461f136a0" xlink:to="loc_dei_EntityAddressAddressLine1_8190bc54-9514-4d2e-8848-38fb8006b3c4" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_c414ca23-d5e1-4c02-9903-ecd62c1e59d3" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_17b22a5d-614c-4c17-a5a5-d9e461f136a0" xlink:to="loc_dei_EntityAddressCityOrTown_c414ca23-d5e1-4c02-9903-ecd62c1e59d3" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_474322c8-ba7f-4a39-a46f-b3e134f070dd" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityAddressStateOrProvince"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_17b22a5d-614c-4c17-a5a5-d9e461f136a0" xlink:to="loc_dei_EntityAddressStateOrProvince_474322c8-ba7f-4a39-a46f-b3e134f070dd" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_bad6db8d-8a0c-4107-b89a-0b8b4e7e7183" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_17b22a5d-614c-4c17-a5a5-d9e461f136a0" xlink:to="loc_dei_EntityAddressPostalZipCode_bad6db8d-8a0c-4107-b89a-0b8b4e7e7183" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_cd6e4c35-8e51-439a-a64d-680ad7fd0c13" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_17b22a5d-614c-4c17-a5a5-d9e461f136a0" xlink:to="loc_dei_CityAreaCode_cd6e4c35-8e51-439a-a64d-680ad7fd0c13" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_299eea1c-a478-4961-aa20-ecdd829eff55" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_17b22a5d-614c-4c17-a5a5-d9e461f136a0" xlink:to="loc_dei_LocalPhoneNumber_299eea1c-a478-4961-aa20-ecdd829eff55" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_WrittenCommunications_205aaf55-d2a8-43aa-a5f8-c21efe554936" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_WrittenCommunications"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_17b22a5d-614c-4c17-a5a5-d9e461f136a0" xlink:to="loc_dei_WrittenCommunications_205aaf55-d2a8-43aa-a5f8-c21efe554936" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SolicitingMaterial_9cf3a54b-bb1a-4065-a088-44eb1ee5c1e2" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_SolicitingMaterial"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_17b22a5d-614c-4c17-a5a5-d9e461f136a0" xlink:to="loc_dei_SolicitingMaterial_9cf3a54b-bb1a-4065-a088-44eb1ee5c1e2" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementTenderOffer_0f4f4aa1-9ce9-45fc-bdfb-f210da3dad35" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_PreCommencementTenderOffer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_17b22a5d-614c-4c17-a5a5-d9e461f136a0" xlink:to="loc_dei_PreCommencementTenderOffer_0f4f4aa1-9ce9-45fc-bdfb-f210da3dad35" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementIssuerTenderOffer_7402436c-e6d5-422e-9a45-7a7a131c82a5" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_PreCommencementIssuerTenderOffer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_17b22a5d-614c-4c17-a5a5-d9e461f136a0" xlink:to="loc_dei_PreCommencementIssuerTenderOffer_7402436c-e6d5-422e-9a45-7a7a131c82a5" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_7b4c269e-ee2f-42a0-ad20-4012f44ff64d" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_17b22a5d-614c-4c17-a5a5-d9e461f136a0" xlink:to="loc_dei_Security12bTitle_7b4c269e-ee2f-42a0-ad20-4012f44ff64d" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_22931f56-6726-4708-8404-395ce6305b43" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_17b22a5d-614c-4c17-a5a5-d9e461f136a0" xlink:to="loc_dei_TradingSymbol_22931f56-6726-4708-8404-395ce6305b43" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_8ec64d67-f2a8-480c-8ab9-478dc3e73d6c" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_17b22a5d-614c-4c17-a5a5-d9e461f136a0" xlink:to="loc_dei_SecurityExchangeName_8ec64d67-f2a8-480c-8ab9-478dc3e73d6c" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_c2f19849-30cb-4c70-9130-707743fcc75c" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_17b22a5d-614c-4c17-a5a5-d9e461f136a0" xlink:to="loc_dei_EntityEmergingGrowthCompany_c2f19849-30cb-4c70-9130-707743fcc75c" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_6a60957c-102c-4dc8-ac79-2264108627ef" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_17b22a5d-614c-4c17-a5a5-d9e461f136a0" xlink:to="loc_dei_EntityCentralIndexKey_6a60957c-102c-4dc8-ac79-2264108627ef" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_fc26e831-5322-43b4-b2db-e696f266216c" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_17b22a5d-614c-4c17-a5a5-d9e461f136a0" xlink:to="loc_dei_AmendmentFlag_fc26e831-5322-43b4-b2db-e696f266216c" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitiesTable_30377629-f2be-4809-b98d-d0c765defc4c" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntitiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_EntityInformationLineItems_17b22a5d-614c-4c17-a5a5-d9e461f136a0" xlink:to="loc_dei_EntitiesTable_30377629-f2be-4809-b98d-d0c765defc4c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_450e50c5-e929-4124-8822-19b470f6f5df" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_EntitiesTable_30377629-f2be-4809-b98d-d0c765defc4c" xlink:to="loc_us-gaap_StatementClassOfStockAxis_450e50c5-e929-4124-8822-19b470f6f5df" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_450e50c5-e929-4124-8822-19b470f6f5df_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_450e50c5-e929-4124-8822-19b470f6f5df" xlink:to="loc_us-gaap_ClassOfStockDomain_450e50c5-e929-4124-8822-19b470f6f5df_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_75596119-cc33-4d5b-935d-148841389d71" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_450e50c5-e929-4124-8822-19b470f6f5df" xlink:to="loc_us-gaap_ClassOfStockDomain_75596119-cc33-4d5b-935d-148841389d71" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_9faedd31-3ed5-4ca4-9bc4-d32fa2b29669" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_75596119-cc33-4d5b-935d-148841389d71" xlink:to="loc_us-gaap_CommonClassAMember_9faedd31-3ed5-4ca4-9bc4-d32fa2b29669" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarrantMember_19bb8a97-ea91-4e2c-a173-7f7daefaabc7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_WarrantMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_75596119-cc33-4d5b-935d-148841389d71" xlink:to="loc_us-gaap_WarrantMember_19bb8a97-ea91-4e2c-a173-7f7daefaabc7" xlink:type="arc" order="1"/>
  </link:definitionLink>
</link:linkbase>
