The substance constituting Earth's atmosphere: a gaseous mixture of nitrogen, oxygen, and various trace gases.
This drill runs on compressed air.
The substance of the atmosphere on a planet other than Earth.
The air on Mars is very thin and consists mostly of carbon dioxide.
The apparently open space above the ground which this substance fills, (historical) formerly thought to be limited by the firmament but (meteorology) now considered to be surrounded by the near-vacuum of outer space.
The flock of birds took to the air.
To bring (something) into contact with the air, so as to freshen or dry it.
I'll hang these clothes on the rack to air them.
To let fresh air into (a room or a building), to ventilate.
Initialism of All India Radio, the national public radio broadcaster of India.
Initialism of American Institutes for Research, a nonprofit research organization in the United States.
The station code of Airport in Hong Kong.
From Middle English aire, from Old French air, from Latin āēr, from Ancient Greek ἀήρ (aḗr). Displaced native Old English lyft. More at lift, loft.
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It's getting quite stuffy in this room: let's open the windows and air it.
Pronunciation spelling of are.