acid meaning and definition

ACID noun

Definition of acid (noun)

1. any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt
2. street name for lysergic acid diethylamide
   • synonyms: back breaker, battery-acid, dose, dot, Elvis, loony toons, Lucy in the sky with diamonds, pane, superman, window pane, Zen

ACID adjective

Definition of acid (adjective)

1. harsh or corrosive in tone
   • "an acerbic tone piercing otherwise flowery prose"; "a barrage of acid comments"; "her acrid remarks make her many enemies"; "bitter words"; "blistering criticism"; "caustic jokes about political assassination, talk-show hosts and medical ethics"; "a sulfurous denunciation"; "a vitriolic critique"
   • synonyms: acerb, acerbic, acrid, bitter, blistering, caustic, sulfurous, sulphurous, virulent, vitriolic
2. being sour to the taste
   • synonyms: acidic, acidulent, acidulous
3. having the characteristics of an acid
   • "an acid reaction"