Definition of acid
- acid Adjective Sour, sharp, or biting to the taste; tart; having the taste of vinegar.
- acid Adjective Sour-tempered.
- acid Adjective Of or pertaining to an acid; acidic.
- acid Adjective Denoting a musical genre that is a distortion (as if hallucinogenic) of an existing genre, as in acid house, acid jazz, acid rock.
- acid Noun A sour substance.
- acid Noun Any of several classes of compound having the following properties:-
- acid Noun lysergic acid diethylamide