/rɪ'strɪkʃn; rɪ`strɪkʃən/
n
1 [U] restricting or being restricted 限制; 约束
*restriction of expenditure 对开支的限制.
2 [C esp pl 尤作复数] ~ (on sth) instance of this; law, etc that restricts 限制; 约束; 限制性规定
*raise, lift, ban, abolish, etc a restriction 撤消限制
* place, impose, enforce, etc a restriction 实行限制
* speed, price, import, etc restrictions 速度、价格、进口等限制
* There are currency restrictions on the sums allowed for foreign travel. 到国外旅行允许携带的款额有所限制.
* The sale of firearms is subject to many legal restrictions. 出售枪枝受到许多法律限制.

n
[C]
a rule or law that limits or controls what people can do
restriction on
　restrictions on immigration
　a 50 mph speed restriction
trade/travel restrictions
impose/place restrictions on sth
　The law imposed new financial restrictions on private companies.
strict/tough/tight restriction
　tougher restrictions on alcohol advertising
lift/remove a restriction
　Restrictions on trade were lifted.
[U]
when you restrict the size, amount, or range of something