noun (n)

• conformity to fact or truth(noun.attribute)

  Synonym:
  rightness
  Antonym:
  incorrectness, wrongness
  

  source: wordnet30
• the quality of conformity to social expectations(noun.attribute)

  Antonym:
  incorrectness
  

  source: wordnet30
• The state or quality of being correct; as, the correctness of opinions or of manners; correctness of taste; correctness in writing or speaking; the correctness of a text or copy.(noun)

  source: webster1913