Akademik

private eye
noun
someone who can be employed as a detective to collect information (Freq. 12)
Syn: ↑private detective, ↑PI, ↑private investigator, ↑operative, ↑shamus, ↑sherlock
Hypernyms: ↑detective
Hyponyms: ↑hotel detective, ↑house detective, ↑house dick, ↑inquiry agent, ↑store detective

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ˌprivate deˈtective [private detective] (also ˌprivate inˈvestigator) (also informal ˌprivate ˈeye) noun
a ↑detective who is not in the police, but who can be employed to find out information, find a missing person, follow sb, etc.
See also:private investigator

Useful english dictionary. 2012.