sour

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
    

• inaccurate in pitch
  • a false (or sour) note
    
  • her singing was off key
    

• in an unpalatable state
  • sour milk
    

• one of the four basic taste sensations; like the taste of vinegar or lemons

• having a sharp biting taste

• smelling of fermentation or staleness

Noun

• the property of being acidic

• the taste experience when vinegar or lemon juice is taken into the mouth

• a cocktail made of a liquor (especially whiskey or gin) mixed with lemon or lime juice and sugar

Verb

• make sour or more sour

• go sour or spoil
  • The milk has soured
    
  • The wine worked
    
  • The cream has turned--we have to throw it out
    

Related words

• Synonyms: 
  dark , dour , glowering , glum , moody , morose , saturnine , sullen , false , off-key , off , turned , rancid , sourness , acidity , tartness , acidify , acidulate , acetify , turn , ferment , work
• Antonyms: 
  sweet , sweeten , dulcify , edulcorate , dulcorate