re·stric·tion/rɪ`strɪkʃən; rɪˈstrɪkʃən/ n [C,U] a rule or law that limits what you are allowed to do 限制，约束: + on There's no restriction on how many tickets you can buy. 可购买的门票数量没有限制。 without restriction freedom to travel without restriction 不受约束的旅行自由