1. (noun)acid any of various water-soluble compounds having a sourtaste and capable of turninglitmus red and reacting with a base to form a salt
2. (noun)acid, back breaker, battery-acid, dose, dot, Elvis, loony toons, Lucy in the sky with diamonds, pane, superman, window pane, Zen streetname for lysergic acid diethylamide
3. (adj)acerb, acerbic, acid, acrid, bitter, blistering, caustic, sulfurous, sulphurous, virulent, vitriolic 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"
4. (adj)acidic, acid, acidulent, acidulous beingsour to the taste
5. (adj)acid having the characteristics of an acid "an acid reaction"
Definition of 'acid'
