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

(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

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

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

An aerogram; a letter sent by airmail.

A pump that moves air either into or out of something.

a local region of low atmospheric pressure, or a local downward current; especially one that causes an aircraft to lose height suddenly

A small aircraft that makes short passenger flights, especially to destinations not serviced by airlines.

An opening, possibly covered by a grate or grill, possibly ducted, that allows air to circulate. / A device or valve that allows to air to be evacuated from a radiator or pipe in a heating system.