Reversion (law)
（重定向自Reverter）
A reversion in property law is a future interest that is retained by the grantor after the conveyance of an estate of a lesser quantum that he has (such as the owner of a fee simple granting a life estate or a leasehold estate). Once the lesser estate comes to an end (the lease expires or the life estate tenant dies), the property automatically reverts (hence reversion) back to the grantor.