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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.

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

Wright later called an allegation of paying a private investigator to "blag" information from Lady Lawrence "absolute nonsense".

From BBC • Feb. 17, 2026

Wright also strongly denied allegations he met private investigator Jonathan Rees and corrupt police officers in Thornton Heath pubs to pay them for information for stories.

From BBC • Feb. 17, 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

Fenton Hardy, Frank and Joe’s dad, was a private investigator who used to work with the local Bayport police force.

From "Hopping Mad (The Hardy Boys: Secret Files, #4)" by Franklin W. Dixon