Noun nullifier has 2 senses
  1. nullifier - an advocate of nullification; someone who believes that a state can resist federal laws
    --1 is a kind of
    advocate, advocator, proponent, exponent
    Derived form: verb nullify1
  2. invalidator, voider, nullifier - an official who can invalidate or nullify; "my bank check was voided and I wanted to know who the invalidator was"
    --2 is a kind of official, functionary
    Derived form: verb nullify1
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