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Federal Bureau of Investigation

British  

noun

  1. See FBI

"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

Federal Bureau of Investigation Cultural  
  1. An agency of the United States federal government, long headed by J. Edgar Hoover, which investigates violations of federal (rather than state or local) laws, including kidnaping, smuggling narcotics, and espionage.


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Established in 1908 under the Department of Justice, the FBI earned its reputation in the 1920s and 1930s by apprehending notorious bank robbers and gangsters.

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.

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The subpoenas occurred after Federal Bureau of Investigation Director Kash Patel met with White House officials to discuss the bureau’s investigation into leaked details about the plane.

From The Wall Street Journal Jul. 20, 2026

In a social-media post on Sunday morning, Federal Bureau of Investigation Director Kash Patel said his agency “is assisting local authorities and has made every necessary resource available.”

From The Wall Street Journal Jul. 12, 2026

He remains at large, with a $50,000 Federal Bureau of Investigation bounty on his head.

From The Wall Street Journal Jul. 9, 2026

The agency didn’t say where the shooting took place but said the Federal Bureau of Investigation in Houston was investigating the potential assault of a federal law enforcement officer.

From The Wall Street Journal Jul. 8, 2026

In 1942, in the middle of World War II, some strange letters came to the attention of the Federal Bureau of Investigation.

From "The Woman All Spies Fear" by Amy Butler Greenfield

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