noun (n)

• the act of creating written works(noun.act)

  Example:
  It was a matter of disputed authorship.
  

  Synonym:
  composition, penning, writing
  

  source: wordnet30
• the act of initiating a new idea or theory or writing(noun.act)

  Example:
  The authorship of the theory is disputed.
  

  Synonym:
  paternity
  

  source: wordnet30
• The quality or state of being an author; function or dignity of an author.(noun)

  source: webster1913