air

1. air (noun) — sense 1

Definition: The substance constituting Earth's atmosphere: a gaseous mixture of nitrogen, oxygen, and various trace gases.

Example: This drill runs on compressed air.

2. air (noun) — sense 2

Definition: The substance constituting Earth's atmosphere: a gaseous mixture of nitrogen, oxygen, and various trace gases.: The substance of the atmosphere seen as an agency of freshness.

Example: I'm going outside to get some air.

3. air (noun) — sense 3

Definition: The substance constituting Earth's atmosphere: a gaseous mixture of nitrogen, oxygen, and various trace gases.: One of the four elements of the ancient Greeks and Romans.

4. air (verb) — sense 4

Definition: To bring (something) into contact with the air, so as to freshen or dry it.

Example: I'll hang these clothes on the rack to air them.

5. air (verb) — sense 5

Definition: To let fresh air into (a room or a building), to ventilate.

Example: It's getting quite stuffy in this room: let's open the windows and air it.

6. air (verb) — sense 6

Definition: To make public (an opinion, concern, issue, secret, differences, etc); to present to public view (and sometimes discussion).

Example: Residents used the public meeting to air their concerns about the poor state of the roads.