Entry 2 senses Webster, 1913 Lambaste /lămˌ-băst'/ · Lam·baste · IPA /læmˈbeɪst/ 01 v. t. To beat severely; 1. To beat severely;[Low] 2. to scold, reprimand, or berate harshly. Syn. cane, flog, lambaste. — Syn. -- rebuke, rag, reproof, reprimand, jaw, dress down, scold, chide, berate, bawl out, jaw at, remonstrate with, chew out, chew up, have words with, lambast.