counterintelligence

noun

coun·​ter·​in·​tel·​li·​gence ˌkau̇n-tər-in-ˈte-lə-jən(t)s How to pronounce counterintelligence (audio)
: organized activity of an intelligence service designed to block an enemy's sources of information, to deceive the enemy, to prevent sabotage, and to gather political and military information

Examples of counterintelligence in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
For the hundreds of thousands of Russians employed in counterintelligence and law enforcement, catching Western and Ukrainian agents and neutralizing antiwar activists and journalists is now a way to climb the career ladder. Alexander Gabuev, Foreign Affairs, 17 Apr. 2025 The order exempted any Agency which is involved in intelligence, counterintelligence, investigative or national security work from the provisions of Chapter 5 United States Code, Title 71, the Labor-Management Relations statute. Walter Pavlo, Forbes.com, 30 Mar. 2025 Buma focused on counterintelligence and counterproliferation matters. Scott MacFarlane, CBS News, 20 Mar. 2025 Schumer's bill, the Operational Security (OPSEC) Act of 2025, would establish a new office to train administration officials in security protocols and to identify counterintelligence operations. Stephen Neukam, Axios, 2 Apr. 2025 See All Example Sentences for counterintelligence

Word History

First Known Use

1940, in the meaning defined above

Time Traveler
The first known use of counterintelligence was in 1940

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Cite this Entry

“Counterintelligence.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/counterintelligence. Accessed 30 Apr. 2025.

Kids Definition

counterintelligence

noun
coun·​ter·​in·​tel·​li·​gence ˌkau̇nt-ə-rin-ˈtel-ə-jən(t)s How to pronounce counterintelligence (audio)
: activities of an intelligence service meant to hide the truth from an enemy or to prevent the enemy from learning secret information

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