restriction

英 [rɪ'strɪkʃ(ə)n] 美[rɪ'strɪkʃən]

• n. 限制；约束；束缚

1. a principle that limits the extent of something;

"I am willing to accept certain restrictions on my movements"

2. an act of limiting or restricting (as by regulation)

3. the act of keeping something within specified bounds (by force if necessary)