Nullification, in United States constitutional history, is a legal theory that a state has the right to nullify, or invalidate, any federal laws which that state has deemed unconstitutional with respect to the United States Constitution. The theory of nullification has never been legally upheld by federal courts.

What does nullification mean?

1 : the act of nullifying : the state of being nullified. 2 : the action of a state impeding or attempting to prevent the operation and enforcement within its territory of a law of the U.S.

What is the best definition of nullification?

noun. an act or instance of nullifying. the state of being nullified. (often initial capital letter) the failure or refusal of a U.S. state to aid in enforcement of federal laws within its limits, especially on Constitutional grounds.