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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.

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

After setting up his own company, he was hired an as in-house private investigator for two US news shows.

From BBC • Feb. 3, 2026

He added that her notes referred to a private investigator who had charged her £400.

From BBC • Jan. 26, 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