re·stric·tion / riˈstrikshən/ • n. (often restrictions) a limiting condition or measure, esp. a legal one: planning restrictions on commercial development. ∎ the limitation or control of someone or something, or the state of being limited or restricted: the restriction of local government power. DERIVATIVES: re·stric·tion·ism / -ˌnizəm/ n. re·stric·tion·ist / -nist/ adj. & n.