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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

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

FBI Director Kash Patel filed a $250 million defamation lawsuit against the Atlantic and one of its writers, alleging a recent article was malicious and inaccurate.

From The Wall Street Journal • Apr. 20, 2026

In the meantime, the FBI traced the truck used in the bombing to a rental facility in Kansas.

From Slate • Apr. 19, 2026

In November 2024, Immigration and Customs Enforcement arrested Anmol Bishnoi — Lawrence Bishnoi’s younger brother — in Nebraska, according to the FBI.

From Los Angeles Times • Apr. 18, 2026

The FBI is continuing to investigate the case, with three other defendants - all based in America and in their 20s - also facing criminal charges.

From BBC • Apr. 17, 2026

One hundred miles northwest, in Atlanta’s federal penitentiary, the FBI finally gave up on trying to flip Rudolf Abel.

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

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