Definition of Sour

Noun

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

Verb

• make sour or more sour
  acidify acidulate acetify
• go sour or spoil
  "The milk has soured"
  "The wine worked"
  "The cream has turned--we have to throw it out"
  turn ferment work

Adjective

• 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"
  dark dour glowering glum moody morose saturnine sullen
• inaccurate in pitch
  "a false (or sour) note"
  "her singing was off key"
  false - off key
• in an unpalatable state
  "sour milk"
  off turned
• one of the four basic taste sensations
  like the taste of vinegar or lemons
  
• having a sharp biting taste
  
• smelling of fermentation or staleness
  rancid

• Scrabble® score of the sour (4)
• Word Chums® score of the sour (5)
• Words With Friends® score of the sour (5)