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A

A kind of pump for exhausting air from a vessel or closed space; also, a pump to condense air of force in into a closed space.

One of the spaces in different parts. of the bodies of birds, which are filled with air and connected with the air passages of the lungs; an air cell.

A passage, usually vertical, for admitting fresh air into a mine or a tunnel.

A stove for heating a current of air which is directed against its surface by means of pipes, and then distributed through a building.

A vessel, cell, duct, or tube containing or conducting air; as the air vessels of insects, birds, plants, etc.; the air vessel of a pump, engine, etc. For the latter, see Air chamber. The air vessels of insects are called tracheæ, of plants spiral vessels.

Erected in the air; having no solid foundation; chimerical; as, an air-built castle.

Drawn in air; imaginary. This is the air-drawn dagger. Shak.

Slacked, or pulverized, by exposure to the air; as, air-slacked lime.

So tight as to be impermeable to air; as, an air-tight cylinder.

Any device, as a balloon, aëroplane, etc., for floating in, or flying through, the air.

One who exposes to the air.

In an airy manner; lightly; gaily; jauntily; fippantly.

The state or quality of being airy; openness or exposure to the air; as, the airiness of a country seat.

A walk or a ride in the open air; a short excursion for health's sake.

Not open to a free current of air; wanting fresh air, or communication with the open air.

Resembling air.

A thoughtless, gay person. [Obs.] "Slight airlings." B. Jonson.

A man who ascends or flies in an aircraft; a flying machine pilot.

Art, skill, or ability in the practice of aërial navigation.