a rule that everyone must stay at home between particular times, usually at night, especially during a war or a period of political trouble

to impose/lift a curfew 实行／取消戒严

a midnight curfew 午夜宵禁

He was shot for breaking (= not obeying) the curfew. 他因违反宵禁令而遭到枪击。

a time by which a child must be home in the evening

You'll be in trouble if you get home after curfew. 如果你超过规定时间回家会遇到麻烦的。