From WordNet (r) 3.0 (2006):
air
n 1: a mixture of gases (especially oxygen) required for
breathing; the stuff that the wind consists of; "air
pollution"; "a smell of chemicals in the air"; "open a
window and let in some air"; "I need some fresh air"
2: the region above the ground; "her hand stopped in mid air";
"he threw the ball into the air"
3: a distinctive but intangible quality surrounding a person or
thing; "an air of mystery"; "the house had a neglected air";
"an atmosphere of defeat pervaded the candidate's
headquarters"; "the place had an aura of romance" [syn:
air, aura, atmosphere]
4: a slight wind (usually refreshing); "the breeze was cooled by
the lake"; "as he waited he could feel the air on his neck"
[syn: breeze, zephyr, gentle wind, air]
5: the mass of air surrounding the Earth; "there was great heat
as the comet entered the atmosphere"; "it was exposed to the
air" [syn: atmosphere, air]
6: once thought to be one of four elements composing the
universe (Empedocles)
7: a succession of notes forming a distinctive sequence; "she
was humming an air from Beethoven" [syn: tune, melody,
air, strain, melodic line, line, melodic phrase]
8: medium for radio and television broadcasting; "the program
was on the air from 9 til midnight"; "the president used the
airwaves to take his message to the people" [syn: air,
airwave]
9: travel via aircraft; "air travel involves too much waiting in
airports"; "if you've time to spare go by air" [syn: air
travel, aviation, air]
v 1: expose to fresh air; "aerate your old sneakers" [syn: air
out, air, aerate]
2: be broadcast; "This show will air Saturdays at 2 P.M."
3: broadcast over the airwaves, as in radio or television; "We
cannot air this X-rated song" [syn: air, send,
broadcast, beam, transmit]
4: make public; "She aired her opinions on welfare" [syn:
publicize, publicise, air, bare]
5: expose to warm or heated air, so as to dry; "Air linen"
6: expose to cool or cold air so as to cool or freshen; "air the
old winter clothes"; "air out the smoke-filled rooms" [syn:
vent, ventilate, air out, air]