Noun nullification has 2 senses
  1. nullification - the states'-rights doctrine that a state can refuse to recognize or to enforce a federal law passed by the United States Congress
    --1 is a kind of
    states' rights
    Derived form: verb nullify1
  2. nullification, override - the act of nullifying; making null and void; counteracting or overriding the effect or force of something
    --2 is a kind of change of state
    --2 has particulars:
     cancellation; vitiation; neutralization, neutralisation, counteraction; neutralization, neutralisation
    Derived forms: verb nullify1, verb nullify3
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