Meaning of nullification

nul•li•fi•ca•tion

Pronunciation: (nul"u-fi-kā'shun), [key]
— n.
  1. an act or instance of nullifying.
  2. the state of being nullified.
  3. (often cap.) the failure or refusal of a U.S. state to aid in enforcement of federal laws within its limits, esp. on Constitutional grounds.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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