noun (n)

• the state of being cancelled or annulled(noun.state)

  Synonym:
  annulment
  

  source: wordnet30
• the act (by someone having the authority) of annulling something previously done(noun.act)

  Example:
  The revocation of a law.
  

  source: wordnet30
• The act of calling back, or the state of being recalled; recall.(noun)

  source: webster1913