plainclothes /ˈpleɪˌnkləʊz, -ˈkləʊðz/

• 1. 

  in plain clothes ADJ Plainclothes police officers wear ordinary clothes instead of a police uniform. 穿便衣的 [ADJ n] →see plain

  例：

  He was arrested by plainclothes detectives as he walked through the customs hall.

  他穿过海关大厅时被便衣侦探逮捕了。