private detective
noun🔊/ˌpraɪvət dɪˈtektɪv/
🔊/ˌpraɪvət dɪˈtektɪv/
(also private investigator)
(also informal private eye)
a detective who is not in the police, but who can be employed to find out information, find a missing person, follow somebody, etc. 私人侦探 She hired a private detective to follow her husband. 她雇了个私人侦探跟踪丈夫。