/euh demp"sheuhn/ , n. Law.
the failure of a legacy because the subject matter no longer belongs to the testator's estate at death.
[ 1580-90; ademption- (s. of ademptio ) a taking away, equiv. to adempt ( us ) ( ad- AD- + em ( p )-, s. of emere to take + -tus ptp. suffix) + -ion- -ION ]