noun (n)

• the condition of being relieved from blame or obligation(noun.state)

  source: wordnet30
• the act of vindicating or defending against criticism or censure etc.(noun.act)

  Synonym:
  vindication
  

  source: wordnet30
• The act of disburdening, discharging, or freeing morally from a charge or imputation; also, the state of being disburdened or freed from a charge.(noun)

  source: webster1913