Dictionary.com
Thesaurus.com

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.


Discover More

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.

See Examples For:

Estimate of the number of states hit by cyberattacks on their water and wastewater utilities last week, according to the Federal Bureau of Investigation and Environmental Protection Agency.

From The Wall Street Journal Aug. 3, 2026

This begins with correcting the dearth of knowledge inside the Federal Bureau of Investigation and other U.S. government agencies about the Brotherhood and Islamism in general.

From The Wall Street Journal Aug. 2, 2026

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

The Federal Bureau of Investigation confirmed the agency responded to the scene immediately following the shooting.

From The Wall Street Journal Jul. 13, 2026

The New York police passed the hollow nickel on to the Federal Bureau of Investigation.

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

Vocabulary.com logo
by dictionary.com

Dictionary.com's Learning Companion

Go beyond just looking up words.
Remember them forever with VocabTrainer.

Start training