nullification - the act of nullifying; making null and void; counteracting or overriding the effect or force of somethingchange of state - the act of changing something into something different in essential characteristics cancellation - the act of cancelling; calling off some arrangement vitiation - nullification by the destruction of the legal force; rendering null; "the vitiation of the contract" neutralization, neutralisation - action intended to keep a country politically neutral or exclude it from a possible war; "the neutralization of Belgium" |