nullifier

Definitions of nullifier
  1. noun
    an official who can invalidate or nullify
    synonyms: invalidator, voider
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    type of:
    functionary, official
    a worker who holds or is invested with an office
  2. noun
    an advocate of nullification; someone who believes that a state can resist federal laws
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    type of:
    advocate, advocator, exponent, proponent
    a person who pleads for a person, cause, or idea
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