Reversement and Nullification

noun

• The states'-rights doctrine that a state can refuse to recognize or to enforce a federal law passed by the United States Congress.
• The act of nullifying; making null and void; counteracting or overriding the effect or force of something.
  • synonyms: override

• (n.) The act of nullifying; a rendering void and of no effect or of no legal effect.
• (n.) The act of nullifying; a rendering void and of no effect or of no legal effect.