1 [C] a type of door in an entrance to a large building that turns around in a circle as people go through it 旋转门

2 [sing] used to talk about a place or an organization that people enter and then leave again very quickly ﹙用以表示某地方或机构人员出入或流动非常频繁﹚: The newsroom became a revolving-door workplace. 新闻编辑室里人员进出频繁。

3 [sing] used to talk about a situation in which the same events or problems keep happening ﹙用以描述同样的事或问题不断出现的局面﹚: The lack of juvenile detention facilities creates a ‘revolving door’ for young criminal suspects (they keep being arrested by the police and then released again very quickly).青少年拘留设施的缺乏使年轻的嫌疑犯们陷入了“循环活动”﹙他们不断被警方逮捕，而后又很快地被释放﹚。