[re.ver.sion] n [ME, fr. MF, fr. L reversion-, reversio act of returning, fr. revertere] (15c) 1 a: the part of a simple estate remaining in the control of its owner after the owner has granted therefrom a lesser particular estate b: a future interest in property left in the control of a grantor or the grantor's successor
2: the right of succession or future possession or enjoyment 3 a: an act or the process of returning (as to a former condition) b: a return toward an ancestral type or condition: reappearance of an ancestral character
4: an act or instance of turning the opposite way: the state of being so turned
5: a product of reversion; specif: an organism with an atavistic character: throwback