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air raid a military raid by aircraft, esp. bombers.
air rifle a rifle operated by compressed air, used to fire small pellets or the like.
air sac an air-filled space or cavity in a living organism, esp. any of the ends of certain bronchial tubes in a bird's body that connect with the larger body cavity and assist in breathing.
air shaft a narrow vertical passage through which fresh air can reach an otherwise enclosed area such as the interior of a building; ventilating shaft.
airship a lighter-than-air aircraft, with its own propulsion system and steering control.
airsick nauseated because of air travel; suffering from airsickness.
airsickness motion sickness, usu. including nausea, caused by air travel.
airspace the space extending above a particular land area, esp. that of a political entity. [2 definitions]
airspeed the speed of a flying object, esp. an aircraft, relative to the surrounding air.
airstrip an airfield or landing strip, usu. unpaved and without the personnel or equipment of an airport; runway.
air taxi a small aircraft that carries passengers or cargo over short distances, esp. to places not served by regular airlines.
airtight preventing the entrance or exit of air. [2 definitions]
airtime broadcast time allotted, as to an event or news story, on television or radio.
air-to-air of a missile or the like, designed to be shot by an aircraft at an aerial target.
airwaves the media used for transmission of radio and television signals.
airway a route of passage for an aircraft. [3 definitions]
air well a usu. central court that is enclosed by the exterior walls of a building and provides air and light.
airworthy fit and safe for use in flight.
airy open to the flow of air; breezy. [5 definitions]
aisle any passageway, as between sections of seats in a theater or sections of shelves in a store. [2 definitions]
ajar1 partly opened, as a hinged door, window, or lid.