[koun-ter-in-tel-i-juh ns]


the activity of an intelligence service employed in thwarting the efforts of an enemy's intelligence agents to gather information or commit sabotage.
an organization engaged in counterintelligence.

Origin of counterintelligence

First recorded in 1935–40; counter- + intelligence Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for counterintelligence

Contemporary Examples of counterintelligence

British Dictionary definitions for counterintelligence



activities designed to frustrate enemy espionage
intelligence collected about enemy espionage
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 counterintelligence

also counter-intelligence, 1940, from counter- + intelligence.

Online Etymology Dictionary, © 2010 Douglas Harper