nullifier Meaning, Definition & Usage
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noun an advocate of nullification; someone who believes that a state can resist federal laws
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noun an official who can invalidate or nullify
voider; invalidator.
- my bank check was voided and I wanted to know who the invalidator was
WordNet
Nul"li*fi`er noun
Definitions
One who nullifies or makes void; one who maintains the right to nullify a contract by one of the parties.