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
Recent Examples on the Web
The Shin Bet, Israel’s internal security and counterintelligence service, has increased its surveillance of neighborhoods with high proportions of Arabs and has arrested hundreds.
—
Daniel Byman, Foreign Affairs, 28 July 2025
The agent, who specializes in cases involving counterintelligence as well as aircraft and aerospace technology transfers, wrote in the affidavit that evidence ties Zhou to the phone used to call the family and that Li was tied to a phone used to text them.
—Julia Marnin
july 2, Sacbee.com, 2 July 2025
The budget would also decrease funding for national security, counterintelligence, counterterrorism, threat screening and efforts to counter weapons of mass destruction.
—Adeola Adeosun, MSNBC Newsweek, 23 June 2025
This case was a complex, coordinated effort and is an example of outstanding counterintelligence work done by FBI San Francisco, Portland, Houston, San Diego, and the Counterintelligence Division.
—Mike Brest, The Washington Examiner, 1 July 2025
See All Example Sentences for counterintelligence
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Daniel Byman, Foreign Affairs, 28 July 2025
The agent, who specializes in cases involving counterintelligence as well as aircraft and aerospace technology transfers, wrote in the affidavit that evidence ties Zhou to the phone used to call the family and that Li was tied to a phone used to text them.
—Julia Marnin
july 2, Sacbee.com, 2 July 2025
The budget would also decrease funding for national security, counterintelligence, counterterrorism, threat screening and efforts to counter weapons of mass destruction.
—Adeola Adeosun, MSNBC Newsweek, 23 June 2025
This case was a complex, coordinated effort and is an example of outstanding counterintelligence work done by FBI San Francisco, Portland, Houston, San Diego, and the Counterintelligence Division.
—Mike Brest, The Washington Examiner, 1 July 2025
See All Example Sentences for counterintelligence
Cite this Entry
“Counterintelligence.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/counterintelligence. Accessed 1 Aug. 2025.
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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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