What is the meaning of intruder?

(DoD) An individual, unit, or weapon system, in or near an operational or exercise area, which presents the threat of intelligence gathering or disruptive activity.
Department of Defense Dictionary of Military and Associated Terms. 31 January 2011.
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APAMilitary Dictionary (DoD). (2011). intruder. Retrieved September 26, 2026, from http://smartdefine.org/intruder/definitions/1962309
ChicagoMilitary Dictionary (DoD). 2011. "intruder" http://smartdefine.org/intruder/definitions/1962309 (accessed September 26, 2026).
HarvardMilitary Dictionary (DoD) 2011, intruder, Smart Define, viewed 26 September, 2026, <http://smartdefine.org/intruder/definitions/1962309>.
MLAMilitary Dictionary (DoD). "intruder" 4 April 2011. Web. 26 September 2026. <http://smartdefine.org/intruder/definitions/1962309>
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