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
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Peter, meanwhile, is in pure self-preservation mode, lying his ass off to Javad about his cater-waiter history and denying any career in counterintelligence. Ben Rosenstock, Vulture, 23 Jan. 2025 Part of the reason people doubt Peter is because his father also worked for the FBI and was section chief of counterintelligence. Proma Khosla, IndieWire, 21 Jan. 2025 Back in October, rumors began to circulate that the head of the FSB military counterintelligence department, Nikolai Yuryev, would soon leave his post. Gord Magill, Newsweek, 20 Dec. 2024 Choo Mi-ae from the military’s counterintelligence unit showed that preparations for the declaration had been made at least a month in advance — and that the military had reviewed available medical facilities in seeming anticipation of bloodshed. Max Kim, Los Angeles Times, 14 Dec. 2024 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

Dictionary Entries Near counterintelligence

Cite this Entry

“Counterintelligence.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/counterintelligence. Accessed 21 Feb. 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

More from Merriam-Webster on counterintelligence

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