Pronunciation: (u-sas'u-nāt"), [key]
—v.t., -nat•ed, -nat•ing.
1. to kill suddenly or secretively, esp. a politically prominent person; murder premeditatedly and treacherously.
2. to destroy or harm treacherously and viciously: to assassinate a person's character.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.