lambaste Syllabification: (lam·baste)Pronunciation: /lamˈbāst, -ˈbast/ (also lambast /-ˈbast/)Definition of lambaste verb [with object] criticize (someone or something) harshly:they lambasted the report as a gross distortion of the truthOrigin: mid 17th century (in the sense 'beat, thrash'): from lam1 + baste3. The current sense dates from the late 19th centurylambaste in other Oxford dictionaries Definition of lambaste in the British & World English dictionary