n. The act of restraining, or of holding back or hindering from action or motion, in any manner; hindrance of any action, physical, moral, or mental.n. The state of being repressed, curbed, or held back in any way; specifically, abridgment of liberty; confinement; detention.n. Repression of extravagance, exaggeration, or vehemence; constraint in manner or style; reserve.n. That which restrains, limits, hinders, or represses; a limitation, restriction, or prohibition.n. Restriction; limitation, as in application or definition.n. In dynamics, an absolute geometrical condition supposed to be precisely fulfilled: thus, a body moving upon an unyielding surface is subject to a restraint.n. Synonyms and Constraint, Coercion, etc. (see force, n), repression, check, stop, curb, hold-back.