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Definition of 'sour'

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  1. a cocktail made of a liquor (especially whiskey or gin) mixed with lemon or lime juice and sugar
  2. the taste experience when vinegar or lemon juice is taken into the mouth
       Synonyms: sourness tartness
  3. the property of being acidic
       Synonyms: sourness acidity


  1. go sour or spoil; "The milk has soured"; "The wine worked"; "The cream has turned--we have to throw it out"
       Synonyms: turn ferment work
  2. make sour or more sour
       Synonyms: acidify acidulate acetify
       Antonyms: sweeten dulcify edulcorate dulcorate


  1. smelling of fermentation or staleness
       Synonyms: rancid
  2. having a sharp biting taste
       Antonyms: sweet
  3. one of the four basic taste sensations; like the taste of vinegar or lemons
  4. in an unpalatable state; "sour milk"
       Synonyms: off turned
  5. inaccurate in pitch; "a false (or sour) note"; "her singing was off key"
       Synonyms: false off-key
  6. 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"
       Synonyms: dark dour glowering glum moody morose saturnine sullen

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