noun
1. the states'-rights doctrine that a state can refuse to recognize or to enforce a federal law passed by the United States Congress
• Derivationally related forms: ↑nullify
• Hypernyms: ↑states' rights
2. the act of nullifying; making null and void; counteracting or overriding the effect or force of something
• Syn: ↑override
• Hypernyms: ↑change of state
• Hyponyms: ↑cancellation, ↑vitiation, ↑neutralization, ↑neutralisation, ↑counteraction
Useful english dictionary. 2012.