air (Noun) — A mixture of gases (especially oxygen) required for breathing; the stuff that the wind consists of. ex. "air pollution" ex. "a smell of chemicals in the air" ex. "open a window and let in some air" ex. "I need some fresh air"
air (Noun) — The region above the ground. ex. "her hand stopped in mid air" ex. "he threw the ball into the air"
air (Noun) — A distinctive but intangible quality surrounding a person or thing. ex. "an air of mystery" ex. "the house had a neglected air"
air (Noun) — A slight wind (usually refreshing). ex. "as he waited he could feel the air on his neck"
air (Noun) — The mass of air surrounding the Earth. ex. "it was exposed to the air"
air (Noun) — A succession of notes forming a distinctive sequence. ex. "she was humming an air from Beethoven"
air (Noun) — Medium for radio and television broadcasting. ex. "the program was on the air from 9 til midnight"
air (Noun) — Travel via aircraft. ex. "air travel involves too much waiting in airports" ex. "if you've time to spare go by air"
air (Noun) — Once thought to be one of four elements composing the universe (Empedocles).
air (Verb) — Expose to fresh air. ex. "air your old sneakers"
air (Verb) — (broadcast medium) be broadcast. ex. "This show will air Saturdays at 2 P.M."
air (Verb) — (broadcast medium) broadcast over the airwaves, as in radio or television. ex. "We cannot air this X-rated song"
air (Verb) — Make public. ex. "She aired her opinions on welfare"
air (Verb) — Expose to warm or heated air, so as to dry. ex. "Air linen"
air (Verb) — Expose to cool or cold air so as to cool or freshen. ex. "air the old winter clothes" ex. "air out the smoke-filled rooms"