lash - definition of lash by The Free Dictionary
lash 1 (lăsh) n. 1. a. A stroke or blow with or as if with a whip. b. A whip. c. The flexible portion of a whip, such as a plait or thong. 2. Punishment administered with a whip. 3. a. A lacerating presence or power: the lash of conscience. b. A caustic v...