[mass noun]the action of detaining someone or the state of being detained in official custody, especially as a political prisoner (尤指政治犯的)拘留 he committed suicide while in police detention. 他在被警方拘留期间自杀。 ■the punishment of being kept in school after hours (作为一种处罚的)课后留校 teachers were divided as to the effectiveness of detention. 教师们对于课后留校的效果意见不一。 [count noun]masters gave lines or detentions. 老师不是罚抄写就是罚留校。
语源
late Middle English (in the sense 'withholding of what is claimed or due'): from late Latin detentio(n-), from Latin detinere 'hold back' (see detain)