INTERPOSITION

interposition,n.1. The act of submitting something (such as a pleading or motion) as a defense to an opponent’s claim. 2.Archaic. The action of a state, while exercising its sovereignty, in rejecting a federal mandate that it believes is unconstitutional or overreaching. • The Supreme Court has declared that interposition is an illegal defiance of constitutional authority. — interpose,vb.

[Blacks Law 8th]