| Noun | 1. | sour - a cocktail made of a liquor (especially whiskey or gin) mixed with lemon or lime juice and sugar | |
| 2. | sour - the taste experience when vinegar or lemon juice is taken into the mouth | |
| 3. | sour - the property of being acidic | |
| Verb | 1. | sour - go sour or spoil; "The milk has soured"; "The wine worked"; "The cream has turned--we have to throw it out"change state, turn - undergo a transformation or a change of position or action; "We turned from Socialism to Capitalism"; "The people turned against the President when he stole the election" ferment, work - cause to undergo fermentation; "We ferment the grapes for a very long time to achieve high alcohol content"; "The vintner worked the wine in big oak vats" | |
| 2. | sour - make sour or more sour | |
| Adj. | 1. | sour - smelling of fermentation or staleness | |
| 2. | sour - having a sharp biting tastedry - (of wines) not sweet because of decomposition of sugar during fermentation; "a dry white burgundy" sweet - having a pleasant taste (as of sugar) | |
| 3. | sour - one of the four basic taste sensations; like the taste of vinegar or lemons | |
| 4. | sour - in an unpalatable state; "sour milk" | |
| 5. | sour - inaccurate in pitch; "a false (or sour) note"; "her singing was off key" | |
| 6. | sour - showing a brooding ill humor; "a dark scowl"; "the proverbially dour New England Puritan"; "a glum, hopeless shrug"; "he sat in moody silence"; "a morose and unsociable manner"; "a saturnine, almost misanthropic young genius"- Bruce Bliven; "a sour temper"; "a sullen crowd"ill-natured - having an irritable and unpleasant disposition; "an ill-natured disagreeable old man" | |