Air

Air, ār, n. the fluid we breathe: the atmosphere: any special condition of atmosphere, as in 'the night-air,' 'to take the air:' a light breeze: publicity: the bearing of a person: outward appearance, manner, look: an assumed or affected manner: (mus.) a rhythmical melody: a song, also specially a sprightly song: the soprano part in a harmonised composition, being that which gives it its character: (pl.) affectation.—v.t. to expose to the air: to dry: to expose to warm air: (obs.) to take an airing.—ns. Air′-bath, an arrangement for drying substances in air of any desired temperature; Air′-bed, a bed for the sick, inflated with air; Air′-blad′der, in some fishes, an organ containing air, by which they maintain their equilibrium in the water; Air′-brake, a railway brake worked by compressed air.—adj. Air′-built, built in air: having no solid foundation.—ns. Air′-cell, a cavity containing air; Air′-cush′ion, an air-tight cushion, which can be inflated; Air′-drain, an ample space at the foot of foundation walls, for the sake of dryness.—adj. Air′drawn, drawn in air: visionary: (Shak.) imaginary.—ns. Air′-en′gine, an engine put in motion by air expanded by heat; Air′-gas, illuminating gas made by charging atmospheric air with vapour of petroleum or other hydrocarbon; Air′-gun, a gun which discharges bullets by means of compressed air.—adv. Air′ily, gaily.—ns. Air′iness, state of being airy; openness: liveliness; Air′ing, exposure to the air or fire: a short excursion in the open air; Air′-jack′et, a jacket with air-tight cavities, which being inflated renders a person buoyant in water.—adj. Air′less, void of air: not having free communication with the open air.—ns. Air′-lock, a small chamber for the entrance and exit of men and materials, at the top of the caisson or hollow cylinder used for founding the piers of bridges under water; Air′-pump, an instrument for pumping the air out of a vessel; Air′-sac, an air-cell or air-space, esp. in the bones of birds; Air′-shaft, a passage for air into a mine; Air′-ship, a navigable balloon; Air′-space, the cubic content of a room, hospital-ward, or the like, with reference to the respirable air contained in it.—adj. Air′-tight, so tight as not to admit air.—n. Air′-ves′sel, a vessel or tube containing air.—adv. Air′wards, up in the air.—adj. Air′y, consisting of or relating to air: open to the air: like air: unsubstantial: light of heart: sprightly.—To take air, to get wind, to become publicly known. [Fr.—L. aër—Gr.]