Definition [Cambridge Dictionary]:1. to force someone officially to stay in a place. [扣押、扣留]

2. to delay someone for a short length of time.[耽搁、留住、阻留]

示例：

She made to open the door, but he detained her.

她准备开门，但他把她拦住了。

She was detained without trial for two years.

她未经审讯便被羁押了两年。

Customs officers may detain goods for up to two days.

海关人员可扣留物品两天。

The goods were detained again at customs for lack of certain import papers.

这批货物再次因无相应进口证件被海关扣留。

He was detained at a meeting.

他因会议耽搁了。

补充：detain sb at Her Majesty's pleasure等候女王发落（英国特有说法）