Adjective nullified has 1 sense
  1. invalidated, nullified - deprived of legal force
    Antonym: valid (indirect, via invalid)
,Verb nullify has 3 senses
  1. invalidate, annul, quash, void, avoid, nullify - declare invalid; "The contract was annulled"; "void a plea"
    --1 is one way to cancel, strike down
    Derived forms: noun nullifier2, noun nullification1, noun nullification2, noun nullifier1
    Sample sentences:
    Somebody ----s something
    Something ----s something
  2. invalidate, nullify - show to be invalid
    --2 is one way to negate, contradict
    Sample sentences:
    Somebody ----s something
    Something ----s something
  3. neutralize, neutralise, nullify, negate - make ineffective by counterbalancing the effect of; "Her optimism neutralizes his gloom"; "This action will negate the effect of my efforts"
    --3 is one way to weaken
    Derived form: noun nullification2
    Sample sentences:
    Somebody ----s something
    Something ----s something
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