What is the meaning of the word "air"?

Definitions:

a distinctive but intangible quality surrounding a person or thing noun
- an air of mystery
a succession of notes forming a distinctive sequence noun
- The music teacher hummed an air from a recognizable symphony.
medium for radio and television broadcasting noun
- the program was on the air from 9 til midnight
the region above the ground noun
- I caught the ball in the air.
to be broadcasted verb
- This show will air Saturdays at 2 P.M.
to broadcast over the airwaves, as in radio or television verb
- We cannot air this garbage.
to expose to cool or cold air so as to cool or freshen verb
- It was a hot day, so I opened the doors to try and air my apartment.
to expose to fresh air verb
- I aired my laundry in the spring breeze.
to expose to warm or heated air, so as to dry verb
- Let's air these wet boots.
to make public verb
- They aired their opinions on controversial topics.
travel via aircraft noun
- air travel involves too much waiting in airports