(noun, adjective)


1. harsh or corrosive in tone

- caustic jokes about political assassination, talk-show hosts and medical ethics

Similar word(s): unpleasant, acerb, acerbic, acid, acrid, bitter, blistering, sulfurous, sulphurous, virulent, vitriolic

2. of a substance, especially a strong acid; capable of destroying or eating away by chemical action

Similar word(s): destructive, corrosive, erosive, mordant, vitriolic


1. any chemical substance that burns or destroys living tissue

Definition categories: substance, compound