counterintelligence
coun·ter·in·tel·li·gence
noun \ˌkau̇n-tər-in-ˈte-lə-jən(t)s\Definition of COUNTERINTELLIGENCE
: 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
See First Known Use of COUNTERINTELLIGENCE
1940
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