noun (n)

• being within certain limits that define the range of normal functioning(noun.state)

  Synonym:
  normality
  Antonym:
  abnormalcy, abnormality
  

  source: wordnet30
• expectedness as a consequence of being usual or regular or common(noun.attribute)

  source: wordnet30
• The quality, state, or fact of being normal; as, the point of normalcy.(noun)

  source: webster1913