ACERB Meaning of ACERB in English adjective 1.Synonyms: sour 1, acerbic, acetose, acid, acidulous, dry, tart 2.Synonyms: sarcastic , acerbic, archilochian, caustic, corrosive, ||sarky Merriam Webster. Collegiate thesaurus English vocabulary. Английский энциклопедический словарь тезаурус. 2003