noun (n)

• the quality of being individual(noun.attribute)

  Example:
  So absorbed by the movement that she lost all sense of individuality.
  

  Synonym:
  individualism, individuation
  Antonym:
  commonality, commonness
  

  source: wordnet30
• the distinct personality of an individual regarded as a persisting entity(noun.attribute)

  Synonym:
  identity, personal identity
  

  source: wordnet30
• The quality or state of being individual or constituting an individual; separate or distinct existence; oneness; unity.(noun)

  source: webster1913