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All defensive measures designed to destroy attacking enemy aircraft or missiles in the Earth's envelope of atmosphere, or to nullify or reduce the effectiveness of such attack. Also called AD. See also active air defense; aerospace defense; passive air defense.
Dictionary of Military and Associated Terms. US Department of Defense 2005.
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|Noun||1.||air defense - defensive measures designed to destroy attacking enemy aircraft or missiles or to nullify their effectiveness|
defense, defensive measure, defence - (military) military action or resources protecting a country against potential enemies; "they died in the defense of Stalingrad"; "they were developed for the defense program"
active air defense - air defense by the use aircraft or missiles or artillery or electronic countermeasures
passive air defense - air defense by the use of deception or dispersion or protective construction
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