(noun, adjective, verb)


1. smelling of fermentation or staleness

Similar word(s): malodorous, malodourous, stinky, rancid

2. having a sharp biting taste

Similar word(s): dry, acerb, acerbic, astringent, acetose, acetous, vinegarish, vinegary, acid, acidic, acidulent, acidulous, lemonlike, lemony, sourish, tangy, tart, subacid, soured, tasty

3. one of the four basic taste sensations; like the taste of vinegar or lemons

Similar word(s): tasty

4. in an unpalatable state

- sour milk

Similar word(s): soured, off, turned

5. inaccurate in pitch

- a false (or sour) note

Similar word(s): inharmonious, unharmonious, false

6. showing a brooding ill humor

- a sour temper

Similar word(s): dark, dour, glowering, glum, moody, morose, saturnine, sullen

Sentences with sour as an adjective:

- Lemons have a sour taste.

- He gave me a sour look.

- sour land

- a sour marsh


1. a cocktail made of a liquor (especially whiskey or gin) mixed with lemon or lime juice and sugar

Definition categories: food, cocktail

2. the taste experience when vinegar or lemon juice is taken into the mouth

Similar word(s): sourness, tartness

Definition categories: thought, taste

3. the property of being acidic

Similar word(s): acidity, sourness

Definition categories: attribute


1. go sour or spoil

- The milk has soured

Similar word(s): ferment, turn, work

Definition categories: change, turn

2. make sour or more sour

Similar word(s): acetify, acidify, acidulate

Definition categories: perception

Sentences with sour as a verb:

- Too much lemon juice will sour the recipe.

- We broke up after our relationship soured.