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Synonyms

private investigator

American  

noun

  1. private detective. PI, p.i., P.I.


Etymology

Origin of private investigator

First recorded in 1935–40

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

David Sherborne, for the claimants, repeatedly questioned the private investigator about the statement on Monday - having been given permission by the judge to treat him as a hostile witness and conduct a cross-examination.

From BBC • Mar. 23, 2026

A private investigator who was initially a key witness in a privacy case brought by several claimants against the publisher of the Daily Mail, including Prince Harry, has denied "switching sides" out of revenge.

From BBC • Mar. 23, 2026

Griffiths said her behaviour was proof she would "draw a line" between her professional and personal life, claiming she had never used a private investigator or hacked a phone.

From BBC • Mar. 10, 2026

In 1986, Don Winslow was a 33-year-old New York-born, world-traveling private investigator who, during stakeouts, read crime fiction by authors such as Elmore Leonard, James Ellroy and Joseph Wambaugh.

From The Wall Street Journal • Feb. 6, 2026

The general put him in touch with a private investigator named Peter Kalitka, who’d done contract work for both the DIA and the CIA.

From "Into the Wild" by Jon Krakauer