nullified definition
Nullification (U.S. Constitution) Nullification, in United States constitutional history, is a legal theory that a state has the right to nullify, or invalidate, any federal law which that state has deemed unconstitutional. The theory of nullification has never been legally upheld by federal courts. The theory of nullification is based on a view that the States formed the Union by an agreement among the States, and that as creators of the federal government, the States have the final authority to determine the limits of the powe