counterintelligence
noun
coun·ter·in·tel·li·gence
ˌkau̇n-tər-in-ˈte-lə-jən(t)s 
: 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
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Coast Guard, Secret Service, cyber defense, counterintelligence and the TSA are instrumental to the nation’s defense.
—
Voice Of The People, New York Daily News, 4 Mar. 2026
The fact that many of those fired handled counterintelligence cases was first reported by the New York Sun.
—Sarah N. Lynch, CBS News, 3 Mar. 2026
Produced by Damai Entertainment, and starring Jackson Yee and Zhu Yilong, the film centers on a high-stakes counterintelligence operation to plug a leak of classified data.
—Naman Ramachandran, Variety, 2 Mar. 2026
The heightened posture came as Federal Bureau of Investigation Director Kash Patel put his counterterrorism and counterintelligence teams on high alert after the US and Israel launched a sweeping military assault on Iran.
—Myles Miller, Fortune, 1 Mar. 2026
See All Example Sentences for counterintelligence
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Voice Of The People, New York Daily News, 4 Mar. 2026
The fact that many of those fired handled counterintelligence cases was first reported by the New York Sun.
—Sarah N. Lynch, CBS News, 3 Mar. 2026
Produced by Damai Entertainment, and starring Jackson Yee and Zhu Yilong, the film centers on a high-stakes counterintelligence operation to plug a leak of classified data.
—Naman Ramachandran, Variety, 2 Mar. 2026
The heightened posture came as Federal Bureau of Investigation Director Kash Patel put his counterterrorism and counterintelligence teams on high alert after the US and Israel launched a sweeping military assault on Iran.
—Myles Miller, Fortune, 1 Mar. 2026
See All Example Sentences for counterintelligence
Cite this Entry
“Counterintelligence.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/counterintelligence. Accessed 6 Mar. 2026.
Copy CitationKids Definition
counterintelligence
noun
coun·ter·in·tel·li·gence
ˌkau̇nt-ə-rin-ˈtel-ə-jən(t)s
: 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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