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FBI

American  
[ef-bee-ahy] / ˈɛfˈbiˈaɪ /

noun

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


FBI British  

abbreviation

  1. 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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Byte Spies: The FBI disrupted a China-linked hacking operation that broke into U.S. government networks and critical infrastructure, while hiding its tracks on a global network of hacked devices, cloud-computing infrastructure and even clandestine networks.

From The Wall Street Journal Aug. 30, 2026

The FBI had not shown the Commission all the evidence it had gathered - and declined to comment when the BBC asked about this.

From BBC Aug. 29, 2026

A US military judge ruled Friday that confessions made by alleged 9/11 attacks mastermind Khalid Sheikh Mohammed to FBI agents are inadmissible and cannot be used against him at trial, The New York Times reported.

From Barron's Aug. 28, 2026

Plus: Global outages at Boston Scientific after hack; FBI takes down China-linked cyber operation.

From The Wall Street Journal Aug. 28, 2026

But Traynor pointed out to Dasch that the FBI had two primary objectives.

From Nazi Saboteurs by Samantha Seiple

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