<p><strong>Noun</strong></p><ul><li>a mixture of nitrogen, oxygen, and minute amounts of other gases that surrounds the earth and forms its atmosphere</li><li>a stir in the atmosphere; a light breeze</li><li>overhead space; sky: The planes filled the air</li><li>circulation; publication; publicity: to give air to one's theories</li><li>the general character or complexion of anything; appearance: His early work had an air of freshness and originality</li><li>the peculiar look, appearance, and bearing of a person: There is an air of mystery about him</li><li>airs: affected or unnatural manner; manifestation of pride or vanity; assumed haughtiness: He acquired airs that were insufferable to his friends</li><li>Music: a tune; melody; the soprano or treble part; an aria; also ayre; an Elizabethan art song</li><li>aircraft as a means of transportation: to ship goods by air</li><li>Informal: air conditioning or an air-conditioning system: The price includes tires, radio, and air</li><li>Sports: (during an airborne stunt) the height between the ground and an athlete or an athlete with their equipment: The BMX course was designed for riders to get good air</li><li>such a jump or other airborne stunt: The snowboarder took first place with four clean airs</li><li>Radio: the medium through which radio waves are transmitted</li><li>Archaic: breath</li></ul><p><strong>Verb (used with object)</strong></p><ul><li>to expose to the air; give access to the open air; ventilate (often followed by out): We air the bedrooms every day</li><li>to expose ostentatiously; bring to public notice; display: to air one's opinions; to air one's theories</li><li>to broadcast or televise</li></ul><p><strong>Verb (used without object)</strong></p><ul><li>to be exposed to the open air (often followed by out): Open the window and let the room air out</li><li>to be broadcast or televised</li></ul><p><strong>Adjective</strong></p><ul><li>operating by means of air pressure or by acting upon air: an air drill; an air pump</li><li>of or relating to aircraft or to aviation: air industry</li><li>taking place in the air; aerial: air war</li></ul>