1 a time after which people are not allowed to go outside their homes, for example during a war 宵禁: The government imposed a dusk-to-dawn curfew. 政府实施了从傍晚到黎明的宵禁。

2 (US 美) a time when children must arrive home in the evening 儿童晚上必须回到家的时间: She has a ten o'clock curfew. 她规定孩子晚上10点前必须回到家。