atmospheric pressure or barometric pressure. / the (amount of) pressure of air within something

A region's air supply. / The region supplied by a source of air.

Alternative form of airshaft

(of a missile) fired from the ground at an aircraft in flight, or at an incoming missile

the facility on an airfield or airport where aircraft are loaded and unloaded of passengers or freight

(of a missile) fired from the ground, or from a ship, at an aircraft in flight, or at an incoming missile

(of a missile) fired from an aircraft at a target on the ground

(of a missile) fired from an aircraft at a target on land or water

A designated route used by commercial aircraft when flying from one airport to another.

the science and technology of determining the position of an aircraft with respect to the surface of the earth and accurately maintaining a desired course