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

OpenAI did not name Alfozan in the post but said it had fired the employee involved and referred the matter to the FBI.

From Los Angeles Times ● Oct. 17, 2026

“Every child deserves to feel safe and never be victimized by someone they trust,” said Robert A. Eikhoff, special agent in charge of the FBI Jackson Field Office in Mississippi.

From Los Angeles Times ● Oct. 15, 2026

"This FBI and the US Postal Inspection Service will continue to safeguard the public and secure elections for American citizens," the agencies said in a statement on Thursday.

From BBC ● Oct. 15, 2026

Dad doesn’t know that Mom almost arrived home, which means the FBI doesn’t know either.

From "South of Somewhere" by Kalena Miller

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