1 the act of stopping a person leaving a place, especially by keeping him/her in prison 拘留，羁留（尤指监禁）: They were kept in detention for ten days. 他们给拘留了十天。

2 the punishment of being kept at school after the other schoolchildren have gone home （处罚学生的）课后留校；留堂 ☞verb detain 动词为detain