Adjective sour has 6 senses
  1. sour, rancid - smelling of fermentation or staleness
    Antonym: fragrant (indirect, via malodorous)
  2. sour - having a sharp biting taste
    Antonyms:
    sweet, cloying, saccharine, syrupy, treacly, sweetish
  3. sour - one of the four basic taste sensations; like the taste of vinegar or lemons
    Antonym:
    tasteless (indirect, via tasteful)
  4. off, sour, turned - in an unpalatable state; "sour milk"
    Antonym: unsoured (indirect, via soured)
  5. false, off-key, sour - inaccurate in pitch; "a false (or sour) note"; "her singing was off key"
    Antonym: harmonious (indirect, via inharmonious)
  6. dark, dour, glowering, glum, moody, morose, saturnine, sour, sullen - 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"
    Antonym: good-natured (indirect, via ill-natured)
,Noun sour has 3 senses
  1. sour - a cocktail made of a liquor (especially whiskey or gin) mixed with lemon or lime juice and sugar
    --1 is a kind of
    cocktail
    --1 has particulars: whiskey sour, whisky sour
  2. sour, sourness, tartness - the taste experience when vinegar or lemon juice is taken into the mouth
    --2 is a kind of taste, taste sensation, gustatory sensation, taste perception, gustatory perception
    --2 has particulars: acidity, acidulousness
    Derived form: verb sour2
  3. sourness, sour, acidity - the property of being acidic
    --3 is a kind of taste property
    --3 has particulars: acerbity, tartness; vinegariness, vinegarishness
    Derived form: verb sour2
,Verb sour has 2 senses
  1. sour, turn, ferment, work - go sour or spoil; "The milk has soured"; "The wine worked"; "The cream has turned--we have to throw it out"
    --1 is one way to change state, turn
    Derived form: noun souring1
    Sample sentence:
    Something ----s
  2. sour, acidify, acidulate, acetify - make sour or more sour
    --2 is one way to change taste
    Antonyms: sweeten, dulcify, edulcorate, dulcorate
    Derived forms: noun sour3, noun sour2
    Sample sentences:
    Something ----s
    Somebody ----s something
    Something ----s something
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