(military) Anti-aircraft artillery. / (military) An anti-aircraft artillery organization. / (military) Anti-aircraft fire.

Radio-frequency electromagnetic waves, usually used in the context of wireless communication; radio waves. / Radio or television broadcasts.

A sealed, airtight chamber, such as in a manned spacecraft or submarine, used to provide access to and from the sealed area without allowing air out or water in.

A pilot of an aircraft. / A member of an air force. / A person of a rank in the U.S. Air Force above airman basic and below airman first class.

Lacking or being without air. / Lacking air circulation. / With air that is stale. / (medicine) Suffering from asphyxia. / (figuratively) Stifling; dead; lacking vitality or excitement.

A passenger-carrying aircraft, especially one of a fleet operated by an airline.

(anatomy) The trachea. / (aviation) A flight path used by aeroplanes.

A feeling of nausea, dizziness etc. caused by the motion of an aircraft; a form of motion sickness.

(aviation) The speed of an aircraft relative to the air through which it is flying.

(aviation) An instrument that displays an aircraft's current airspeed.