term:

Possibility Of Reverter

possibility of reverter

:a future interest in property that is retained by the grantor of a conditional fee or determinable fee and by which property reverts to the grantor upon the occurrence of a particular event or fulfillment of a particular condition compare reversion

Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.