Definition of counterintelligence in English:

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counterintelligence

Pronunciation: /ˌkoun(t)ərinˈteləjəns/

noun

Activities designed to prevent or thwart spying, intelligence gathering, and sabotage by an enemy or other foreign entity.
Example sentences
  • The Intelligence Corps also runs the ultra-secret counter-intelligence outfit the FRU, the Force Research Unit.
  • Swiss counter-intelligence was very effective, too, and 387 spies, mostly Swiss but including 100 Germans, were captured and brought to trial of whom 17 were executed.
  • Our counter-intelligence, which plays a considerable role here, is very fragmented.
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