Dictionary

sour

-adjective

1. having an acid, sharp or tangy taste
2. made rancid by fermentation etc
3. tasting or smelling rancid
4. peevish or bad-tempered
5. (of soil) excessively acid and thus infertile
6. (of petroleum) containing excess sulphur

-noun

1. the sensation of a sour taste
2. a drink made with whiskey, lemon or lime juice and sugar

-verb

1. To make or become sour
2. To become disenchanted