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1. The taste experience when vinegar or lemon juice is taken into the mouth
   - sour, tartness
    
2. The property of being acidic
   - sour, acidity
    
3. A sullen moody resentful disposition
   - sulkiness, sullenness, moroseness

Derived forms: sournesses

See also: sour

Type of: gustatory perception, gustatory sensation, ill nature, taste, taste perception, taste property, taste sensation

Encyclopedia: Sourness