#reversion  (law) an interest in an estate that reverts to the grantor (or his heirs) at the end of some period (e.g., the death of the grantee)
  supertype:  interest.percentage__stake  a right or legal share of something; a financial involvement with something; "they have interests all over the world"; "a stake in the company's future"
  subtype:  escheat  a reversion to the state (as the ultimate owner of property) in the absence of legal heirs

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