Skip to main content
private eye

private eye

24 4.2
A person hired to find out information for someone, often about crimes
  • noun
  • /ˈpraɪvɪt aɪ/
  • Informal
translation icon : detective privado
  • Julia hired a private eye to help find her missing cat after the local police couldn't assist.
  • hired a private eye
  • private eye novels
  • detective turned private eye

Examples

  • You know something, Joe, for a private eye, you sure don't go in for snappy comebacks.

    Fiction book (1991)
  • Dell disappeared again, and Aunt Rootie hired a private eye to find him.

    Fiction book (1990)
  • - Well maybe I could put a private eye on it.

  • - What are you a private eye for, anyway?

  • - He told me to hire a private eye.

  • When he retired, he became a private eye here.

  • You still determined to be a private eye?

  • The story concerns Jake Scarne, a New York private eye with military and police experience.

    Blog text (29)
  • Josh whispered, "I always thought it would be exciting to be a policeman or a private eye."

    Fiction book (1993)
  • I got a former N.Y.P.D. detective-turned private eye at a fund-raiser for the mayor.

Synonyms

detective
vsprivate eye
2.7

A police officer who investigates crimes and finds out what happened

is instead someone hired privately by clients, not employed by police
private investigator
vsprivate eye
64 3.7

A person hired to find facts about crimes or private matters who is not a police officer

is the same role but often expressed in casual speech
private detective
vsprivate eye
30 3.4

A person who is not a police officer and is paid to investigate crimes

is a more informal, shorter name for that same role
PI
vsprivate eye
13 3.7

A person hired to find missing people or information

is the full informal label rather than the shortened form
gumshoe
vsprivate eye
  • Archaic
5 8.4

A detective who works quietly and follows people to find facts

is the normal non-slang expression rather than this casual label
private dick
vsprivate eye
  • Archaic
4 8.8

A person hired to find facts or solve crimes for paying clients

is a more neutral, everyday term instead of slang
shamus
vsprivate eye
  • Archaic
2 9.9

A person paid to find information about crimes or people

is the standard informal phrase rather than this older slang
inquiry agent
vsprivate eye
6.5

A private detective hired to find information for people or businesses

is the more conversational label rather than this formal occupational title

How Formal

private eye
  • Informal
24 4.2
private dick
  • Archaic
4 8.8

Surface Forms

private eye singular
private eyes plural

Morphology

private + eye

The meaning 'private detective' is partially derivable from 'private' (not public) + 'eye' (observer), so learners can get the general idea of a non-public watcher or investigator. However, using 'eye' to mean 'person who investigates' is a metaphorical, conventionalized use and the exact occupational sense is a fixed idiom, so it's not fully predictable for a B1 learner.

Etymology

Private eye may come from a simple picture: a person hired to watch quietly. The word private shows they are not police and eye stands for someone who looks for clues, so the name came to mean 'a private detective'.