U.S. Government.

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

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for fbi

British Dictionary definitions for fbi


abbreviation for (in the US)

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

Word Origin and History for fbi


U.S. Federal Bureau of Investigation, formed 1935 from the former United States Bureau of Investigation (1908).

Online Etymology Dictionary, © 2010 Douglas Harper