Get the FREE one-click dictionary software for Windows
or the iPhone/iPad and Android apps
Verb: nullify  'nú-lu,fI
  1. Declare invalid
    "The contract was nullified";
    - invalidate, annul, quash, void, avoid
     
  2. Make ineffective by counterbalancing the effect of
    "Her optimism nullifies his gloom";
    - neutralize, neutralise [Brit], negate

Derived forms: nullified, nullifies, nullifying

Type of: cancel, contradict, negate, strike down, weaken

Encyclopedia: Nullify