1. n. (meteorology) The substance constituting earth's atmosphere, particularly:
I'm going outside to get some air.
2. n. (historical, philosophy, alchemy) understood as one of the four elements of the ancient Greeks and Romans.
3. n. (historical, medical) understood as a particular local substance with supposed effects on human health.
There was a tension in the air which made me suspect an approaching storm.
4. n. (physics) understood as a gaseous mixture of nitrogen, oxygen, and various trace gases.
5. n. (usually with the) The apparently open space above the ground which this substance fills, (historical) formerly thought to be limited by the firmament but (meteorology) now considered surrounded by th
The flock of birds took to the air.
6. n. A breeze; a gentle wind.
7. n. A feeling or sense.
to give it an air of artistry and sophistication
8. n. A sense of poise, graciousness, or quality.
9. n. (usually plural) Pretension; snobbishness; pretence that one is better than others.
putting on airs
10. n. (music) A song, especially a solo; an aria.
11. n. (informal) Nothing; absence of anything.
12. n. An air conditioner or the processed air it produces. Can be a mass noun or a count noun depending on context; similar to hair.
Could you turn on the air?
Hey, did you mean to leave the airs on all week while you were on vacation?
13. n. (obsolete, chemistry) Any specific gas.
14. n. (snowboarding, skateboarding, motor sports) A jump in which one becomes airborne.
15. n. A television or radio signal.
16. v. To bring (something) into contact with the air, so as to freshen or dry it.
17. v. To let fresh air into a room or a building, to ventilate.
It's getting quite stuffy in this room: let's open the windows and air it.
18. v. To discuss varying viewpoints on a given topic.
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