acid Definition

acid
noun

1. chem.
Any of a group of compounds that have a sour or sharp taste, turn blue litmus paper red, and react with bases to form salts.
2. Any sour substance.
3. slang
LSD.

adj

1. Sour to taste.

Thesaurus: sour, acerbic, acrid, sharp, tart, pungent, vinegary, astringent, bitter, corrosive.
2. Said of remarks, etc: expressing bitterness or anger.

Thesaurus: caustic, vitriolic, trenchant, acerbic, harsh, cutting, hurtful, biting, stinging, sharp, withering.
3. Said of soil, etc: having an acid reaction.
4. chem.
Containing or having the properties of an acid.
5. pop music.
Relating to acid house.

Derivative: acidly
adverb

Idiom: put the acid on someone

(ustral & NZ)
colloq
To pressurize them.

Etymology: 17c: from Latin acidus sour.