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U.S. Government.
Federal Bureau of Investigation: the federal agency charged with investigations for the Attorney General and with safeguarding national security. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for FBI


abbreviation (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
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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
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Related Abbreviations for FBI


Federal Bureau of Investigation
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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