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