n. The act of demanding with authority and compelling to pay or yield; compulsory or authoritative demand; excessive or arbitrary requirement: as, the exaction of tribute or of obedience.n. That which is exacted; a requisition; especially, something compulsorily required without right, or in excess of what is due or proper.n. In law, a wrong done by an officer or one in pretended authority, by taking a reward or fee for that for which the law allows none. See extortion.n. The calling of a party to answer. See exact, v., 4.