Nullification

n.

1.

The act of nullifying; a rendering void and of no effect, or of no legal effect. Right of nullification the right claimed in behalf of a State to nullify or make void, by its sovereign act or decree, an enactment of the general government which it deems unconstitutional.

Noun	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
	2.	nullification - the act of nullifying; making null and void; counteracting or overriding the effect or force of something Synonyms: override

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