#nullification__override  the act of nullifying; making null and void; counteracting or overriding the effect or force of something
  supertype:  change_of_state  the act of changing something into something different in essential characteristics
  subtype:  cancellation  the act of cancelling; calling off some arrangement
     subtype:  abrogation__repeal__annulment  an official or legal cancellation
        subtype:  vacation  the act of making something legally void
        subtype:  recall  the act of removing an official by petition
        subtype:  revocation  the act (by someone having the authority) of annulling something previously done; "the revocation of a law"
     subtype:  write-off__writeoff  the act of cancelling a debt as uncollectible
     subtype:  attainder__civil_death__civildeath  cancellation of civil rights
     subtype:  recission__rescission  the act of rescinding; (law) the cancellation of a contract and the return of the parties to the positions they would have had if the contract had not been made; recission may be brought about by decree or by mutual consent
  subtype:  vitiation  nullification by the destruction of the legal force; rendering null; "the vitiation of the contract"
  subtype:  counteraction__neutralization__neutralisation  action intended to nullify the effects of some previous action
  subtype:  neutralization__neutralisation  action intended to keep a country politically neutral or exclude it from a possible war; "the neutralization of Belgium"

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