Source : Webster's Revised Unabridged Dictionary (1913)

Ademption \A*demp"tion\ ([.a]*d[e^]mp"sh[u^]n), n. [L. ademptio,
   fr. adimere, ademptum, to take away; ad + emere to buy, orig.
   to take.] (Law)
   The revocation or taking away of a grant donation, legacy, or
   the like. --Bouvier.