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

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2020 Workiva-->
<!--r:67c1b766-deed-4a16-ba9f-f2a7a720339c,g:cbe4920a-8349-4931-9cc4-2115f6ef322b-->
<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.vectorgroupltdcik0000766404.com/role/Cover" xlink:type="simple" xlink:href="msof-20200430.xsd#Cover"/>
  <link:definitionLink xlink:role="http://www.vectorgroupltdcik0000766404.com/role/Cover" xlink:type="extended" id="i9f26d9a97bb545c7bb47114ef8cf6a77_Cover"/>
  <link:roleRef roleURI="http://www.vectorgroupltdcik0000766404.com/role/CondensedBalanceSheets" xlink:type="simple" xlink:href="msof-20200430.xsd#CondensedBalanceSheets"/>
  <link:definitionLink xlink:role="http://www.vectorgroupltdcik0000766404.com/role/CondensedBalanceSheets" xlink:type="extended" id="i7e1c8121e6bf4ac3bac9e791fc0c9626_CondensedBalanceSheets"/>
  <link:roleRef roleURI="http://www.vectorgroupltdcik0000766404.com/role/CondensedBalanceSheetsParenthetical" xlink:type="simple" xlink:href="msof-20200430.xsd#CondensedBalanceSheetsParenthetical"/>
  <link:definitionLink xlink:role="http://www.vectorgroupltdcik0000766404.com/role/CondensedBalanceSheetsParenthetical" xlink:type="extended" id="ib591e1b308ff49e9b996e9fa86ed208d_CondensedBalanceSheetsParenthetical"/>
  <link:roleRef roleURI="http://www.vectorgroupltdcik0000766404.com/role/CondensedStatementsofOperations" xlink:type="simple" xlink:href="msof-20200430.xsd#CondensedStatementsofOperations"/>
  <link:definitionLink xlink:role="http://www.vectorgroupltdcik0000766404.com/role/CondensedStatementsofOperations" xlink:type="extended" id="i79d97944171b47d785e379ec302083f0_CondensedStatementsofOperations"/>
  <link:roleRef roleURI="http://www.vectorgroupltdcik0000766404.com/role/CondensedStatementofShareholdersDeficiency" xlink:type="simple" xlink:href="msof-20200430.xsd#CondensedStatementofShareholdersDeficiency"/>
  <link:definitionLink xlink:role="http://www.vectorgroupltdcik0000766404.com/role/CondensedStatementofShareholdersDeficiency" xlink:type="extended" id="i1449d2a81adc42cd83ed8c99fde63eb2_CondensedStatementofShareholdersDeficiency">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_bc6fc86b-8cc2-4470-af0e-cff64575cae3" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_36b297a0-720c-4c5d-9711-cf14cfed2cfe" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_bc6fc86b-8cc2-4470-af0e-cff64575cae3" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_36b297a0-720c-4c5d-9711-cf14cfed2cfe" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_f9eea040-44df-4d3b-8bc3-46c237f7047e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_36b297a0-720c-4c5d-9711-cf14cfed2cfe" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_f9eea040-44df-4d3b-8bc3-46c237f7047e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_a671b4e1-3cb8-4516-90fe-5f3fcfc9acc5" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_36b297a0-720c-4c5d-9711-cf14cfed2cfe" xlink:to="loc_us-gaap_StockholdersEquity_a671b4e1-3cb8-4516-90fe-5f3fcfc9acc5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_794826bf-9c64-4644-a246-3324d616d865" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_36b297a0-720c-4c5d-9711-cf14cfed2cfe" xlink:to="loc_us-gaap_NetIncomeLoss_794826bf-9c64-4644-a246-3324d616d865" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_645d7203-cd72-49b3-9c60-e95f0dbcb21f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_05dac6c6-f119-4ee3-948b-0cd7ffe1268c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_a64f344d-dfc0-4295-a20c-c08063517a77" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_bc6fc86b-8cc2-4470-af0e-cff64575cae3" xlink:to="loc_us-gaap_StatementTable_a64f344d-dfc0-4295-a20c-c08063517a77" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_1c29350a-9abe-46fc-9022-8ff42c39a84f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_a64f344d-dfc0-4295-a20c-c08063517a77" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_1c29350a-9abe-46fc-9022-8ff42c39a84f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_1c29350a-9abe-46fc-9022-8ff42c39a84f_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_1c29350a-9abe-46fc-9022-8ff42c39a84f" xlink:to="loc_us-gaap_EquityComponentDomain_1c29350a-9abe-46fc-9022-8ff42c39a84f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_2f315755-e369-431d-abd6-fa9b47e1f7d4" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_1c29350a-9abe-46fc-9022-8ff42c39a84f" xlink:to="loc_us-gaap_EquityComponentDomain_2f315755-e369-431d-abd6-fa9b47e1f7d4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_f45874a1-4ae6-44c5-9357-3b8f212bee40" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_2f315755-e369-431d-abd6-fa9b47e1f7d4" xlink:to="loc_us-gaap_CommonStockMember_f45874a1-4ae6-44c5-9357-3b8f212bee40" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_3fc89378-3cd2-41f8-a012-485ff18a58b3" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_2f315755-e369-431d-abd6-fa9b47e1f7d4" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_3fc89378-3cd2-41f8-a012-485ff18a58b3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_235f7dea-c868-461e-8f5b-45bd12b982d6" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_2f315755-e369-431d-abd6-fa9b47e1f7d4" xlink:to="loc_us-gaap_RetainedEarningsMember_235f7dea-c868-461e-8f5b-45bd12b982d6" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.vectorgroupltdcik0000766404.com/role/CondensedStatementsofCashFlows" xlink:type="simple" xlink:href="msof-20200430.xsd#CondensedStatementsofCashFlows"/>
  <link:definitionLink xlink:role="http://www.vectorgroupltdcik0000766404.com/role/CondensedStatementsofCashFlows" xlink:type="extended" id="i5ef5e88984304d21a8bcd451b52033ce_CondensedStatementsofCashFlows"/>
  <link:roleRef roleURI="http://www.vectorgroupltdcik0000766404.com/role/SummaryofSignificantAccountingPoliciesandOrganization" xlink:type="simple" xlink:href="msof-20200430.xsd#SummaryofSignificantAccountingPoliciesandOrganization"/>
  <link:definitionLink xlink:role="http://www.vectorgroupltdcik0000766404.com/role/SummaryofSignificantAccountingPoliciesandOrganization" xlink:type="extended" id="i5c12dbd720cb40249a5846e4b4e9d20f_SummaryofSignificantAccountingPoliciesandOrganization"/>
  <link:roleRef roleURI="http://www.vectorgroupltdcik0000766404.com/role/SummaryofSignificantAccountingPoliciesandOrganizationPolicies" xlink:type="simple" xlink:href="msof-20200430.xsd#SummaryofSignificantAccountingPoliciesandOrganizationPolicies"/>
  <link:definitionLink xlink:role="http://www.vectorgroupltdcik0000766404.com/role/SummaryofSignificantAccountingPoliciesandOrganizationPolicies" xlink:type="extended" id="i98f4f46c45df4ebbb129a37090d15ba2_SummaryofSignificantAccountingPoliciesandOrganizationPolicies"/>
  <link:roleRef roleURI="http://www.vectorgroupltdcik0000766404.com/role/DueToShareholder" xlink:type="simple" xlink:href="msof-20200430.xsd#DueToShareholder"/>
  <link:definitionLink xlink:role="http://www.vectorgroupltdcik0000766404.com/role/DueToShareholder" xlink:type="extended" id="i159860d0ff8d429eb6a569320e62004b_DueToShareholder"/>
  <link:roleRef roleURI="http://www.vectorgroupltdcik0000766404.com/role/DueToShareholderDetails" xlink:type="simple" xlink:href="msof-20200430.xsd#DueToShareholderDetails"/>
  <link:definitionLink xlink:role="http://www.vectorgroupltdcik0000766404.com/role/DueToShareholderDetails" xlink:type="extended" id="ia1a6fbe273a642ac94cfa4579694eb96_DueToShareholderDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_92e898af-1a20-4ff2-bab6-6dfff15951cd" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_msof_RelatedPartyTransactionLineOfCreditFacilityProvidedByShareholderMaximumBorrowing_f0a25d2a-f044-4473-afad-2662f8cc783d" xlink:href="msof-20200430.xsd#msof_RelatedPartyTransactionLineOfCreditFacilityProvidedByShareholderMaximumBorrowing"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_92e898af-1a20-4ff2-bab6-6dfff15951cd" xlink:to="loc_msof_RelatedPartyTransactionLineOfCreditFacilityProvidedByShareholderMaximumBorrowing_f0a25d2a-f044-4473-afad-2662f8cc783d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionRate_2ca19c7e-f73f-4935-9bee-38cc48c95fd9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyTransactionRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_92e898af-1a20-4ff2-bab6-6dfff15951cd" xlink:to="loc_us-gaap_RelatedPartyTransactionRate_2ca19c7e-f73f-4935-9bee-38cc48c95fd9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msof_RelatedPartyTransactionLineOfCreditFacilityProvidedByShareholderOutstandingAmount_b5c63616-c119-421e-b897-a7a02ed9469d" xlink:href="msof-20200430.xsd#msof_RelatedPartyTransactionLineOfCreditFacilityProvidedByShareholderOutstandingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_92e898af-1a20-4ff2-bab6-6dfff15951cd" xlink:to="loc_msof_RelatedPartyTransactionLineOfCreditFacilityProvidedByShareholderOutstandingAmount_b5c63616-c119-421e-b897-a7a02ed9469d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_msof_RelatedPartyTransactionLineofCreditFacilityProvidedbyShareholderAccruedInterest_7c2d7bb3-ec18-419d-a7c6-ca08867eeda6" xlink:href="msof-20200430.xsd#msof_RelatedPartyTransactionLineofCreditFacilityProvidedbyShareholderAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_92e898af-1a20-4ff2-bab6-6dfff15951cd" xlink:to="loc_msof_RelatedPartyTransactionLineofCreditFacilityProvidedbyShareholderAccruedInterest_7c2d7bb3-ec18-419d-a7c6-ca08867eeda6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_8cd89531-8bd4-409a-a213-94615e91b474" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_92e898af-1a20-4ff2-bab6-6dfff15951cd" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_8cd89531-8bd4-409a-a213-94615e91b474" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_76b0a971-93d6-41b4-bee2-0086f14e7441" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_8cd89531-8bd4-409a-a213-94615e91b474" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_76b0a971-93d6-41b4-bee2-0086f14e7441" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_76b0a971-93d6-41b4-bee2-0086f14e7441_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_76b0a971-93d6-41b4-bee2-0086f14e7441" xlink:to="loc_us-gaap_RelatedPartyDomain_76b0a971-93d6-41b4-bee2-0086f14e7441_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_bebe7816-2ebd-46ef-a100-980dce988c13" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_76b0a971-93d6-41b4-bee2-0086f14e7441" xlink:to="loc_us-gaap_RelatedPartyDomain_bebe7816-2ebd-46ef-a100-980dce988c13" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MajorityShareholderMember_53417562-8469-4c7d-add0-c4f81de76c12" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MajorityShareholderMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_bebe7816-2ebd-46ef-a100-980dce988c13" xlink:to="loc_us-gaap_MajorityShareholderMember_53417562-8469-4c7d-add0-c4f81de76c12" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_39e649cf-35d2-40f6-8825-6773432a081f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_8cd89531-8bd4-409a-a213-94615e91b474" xlink:to="loc_us-gaap_FinancialInstrumentAxis_39e649cf-35d2-40f6-8825-6773432a081f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_39e649cf-35d2-40f6-8825-6773432a081f_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_39e649cf-35d2-40f6-8825-6773432a081f" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_39e649cf-35d2-40f6-8825-6773432a081f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_1238e6d9-2ca4-4fd0-82f2-6f0e324ea4a7" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_39e649cf-35d2-40f6-8825-6773432a081f" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_1238e6d9-2ca4-4fd0-82f2-6f0e324ea4a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msof_IncreaseInCreditFacilityMember_e067c65d-ca53-4bd3-bc69-93f626fa203b" xlink:href="msof-20200430.xsd#msof_IncreaseInCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_1238e6d9-2ca4-4fd0-82f2-6f0e324ea4a7" xlink:to="loc_msof_IncreaseInCreditFacilityMember_e067c65d-ca53-4bd3-bc69-93f626fa203b" xlink:type="arc" order="0"/>
  </link:definitionLink>
</link:linkbase>
