Noun sourness has 3 senses
  1. sour, sourness, tartness - the taste experience when vinegar or lemon juice is taken into the mouth
    --1 is a kind of taste, taste sensation, gustatory sensation, taste perception, gustatory perception
    --1 has particulars: acidity, acidulousness
  2. sourness, sour, acidity - the property of being acidic
    --2 is a kind of taste property
    --2 has particulars: acerbity, tartness; vinegariness, vinegarishness
  3. sulkiness, sullenness, moroseness, sourness - a sullen moody resentful disposition
    --3 is a kind of ill nature
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