noun (n)

• rejecting or disowning or disclaiming as invalid(noun.communication)

  Example:
  Congressional repudiation of the treaty that the President had negotiated.
  

  Synonym:
  renunciation
  

  source: wordnet30
• refusal to acknowledge or pay a debt or honor a contract (especially by public authorities)(noun.communication)

  Example:
  The repudiation of the debt by the city.
  

  source: wordnet30
• the exposure of falseness or pretensions(noun.act)

  Synonym:
  debunking
  

  source: wordnet30
• The act of repudiating, or the state of being repuddiated; as, the repudiation of a doctrine, a wife, a debt, etc.(noun)

  source: webster1913
• One who favors repudiation, especially of a public debt.(noun)

  source: webster1913