FBI

American

[ef-bee-ahy] / ˈɛfˈbiˈaɪ /

noun

U.S. Government.

Federal Bureau of Investigation: the federal agency charged with investigations for the Attorney General and with safeguarding national security.

FBI British

abbreviation

Federal Bureau of Investigation; an agency of the Justice Department responsible for investigating violations of Federal laws

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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FBI

FBI Director James Comey saw the news of his firing on TV news reports.

From Salon ● Oct. 17, 2026

According to Rouse, the FBI lab in Virginia created three angles of Jackson’s composite face and released it to the public in late 2023.

From Los Angeles Times ● Oct. 16, 2026

Three days before he was to depart, he was arrested by the FBI and charged with trying to record secret conversations within his latest employer, OpenAI, which fired him that day.

From The Wall Street Journal ● Oct. 15, 2026

OpenAI said it had discovered a "sophisticated recording device" hidden in their San Francisco office and alerted the FBI.

From BBC ● Oct. 13, 2026

In Philadelphia, the FBI had picked up Harry Gold, who’d worked as Fuchs’s courier, delivering stolen bomb plans to the Soviets.

From "Fallout: Spies, Superbombs, and the Ultimate Cold War Showdown" by Steve Sheinkin

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023