air defense

system of defense against attacks (aircraft, missiles, etc.) which come from the air

Anti-aircraft warfare, or air defence, is any method of engaging military aircraft in combat from the ground. Various guns and cannons have been used in this role since the first military aircraft were used in World War I, growing in power and accuracy over the years. Starting in the post-World War II era, the guns were joined by the guided missile, specifically the "surface-to-air missile", and today both are used in combination in most roles.
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Noun
1. defensive measures designed to destroy attacking enemy aircraft or missiles or to nullify their effectiveness
(hypernym) defense, defence, defensive measure
(hyponym) active air defense

Eng: air defense
Urdu: (عسکَری) فِضائی دِفاع ۔