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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.

The Advocates have since ceased operations, but co-founder and private investigator, Cynthia Liles, is still running the hotline under the name 2x2 Church Accountability.

From BBC • Feb. 15, 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

If he’s some sort of private investigator for Minerwa.

From "The Light in Hidden Places" by Sharon Cameron