n. a principle that limits the extent of something
n. the act of keeping something within specified bounds (by force if necessary)
n. 限制, 限定, 约束
[计] 限定
1. The government placed a restriction on smoking in public places.
政府在公共场所对吸烟施加了限制。
2. There is a weight restriction on this elevator for safety reasons.
出于安全原因，这部电梯有重量限制。
3. The school has a restriction on using mobile phones during class.
学校在上课期间对使用手机有限制。