(DoD) Information gathered and activities conducted to protect against espionage, other intelligence activities, sabotage, or assassinations conducted by or on behalf of foreign governments or elements thereof, foreign organizations, or foreign persons, or international terrorist activities. Also called CI. See also counterespionage; countersabotage; countersubversion; security; security intelligence.
Department of Defense Dictionary of Military and Associated Terms. 31 January 2011.
| APA | Military Dictionary (DoD). (2011). counterintelligence. Retrieved September 21, 2026, from http://smartdefine.org/counterintelligence/definitions/1961110 |
| Chicago | Military Dictionary (DoD). 2011. "counterintelligence" http://smartdefine.org/counterintelligence/definitions/1961110 (accessed September 21, 2026). |
| Harvard | Military Dictionary (DoD) 2011, counterintelligence, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/counterintelligence/definitions/1961110>. |
| MLA | Military Dictionary (DoD). "counterintelligence" 4 April 2011. Web. 21 September 2026. <http://smartdefine.org/counterintelligence/definitions/1961110> |