(1):

(n.) To expose to the air for the purpose of cooling, refreshing, or purifying; to ventilate; as, to air a room.

(2):

(n.) A particular state of the atmosphere, as respects heat, cold, moisture, etc., or as affecting the sensations; as, a smoky air, a damp air, the morning air, etc.

(3):

(n.) Any aeriform body; a gas; as, oxygen was formerly called vital air.

(4):

(n.) Air in motion; a light breeze; a gentle wind.

(5):

(n.) Carriage; attitude; action; movement; as, the head of that portrait has a good air.

(6):

(n.) Odoriferous or contaminated air.

(7):

(n.) Utterance abroad; publicity; vent.

(8):

(n.) Intelligence; information.

(9):

(n.) A musical idea, or motive, rhythmically developed in consecutive single tones, so as to form a symmetrical and balanced whole, which may be sung by a single voice to the stanzas of a hymn or song, or even to plain prose, or played upon an instrument; a melody; a tune; an aria.

(10):

(n.) In harmonized chorals, psalmody, part songs, etc., the part which bears the tune or melody - in modern harmony usually the upper part - is sometimes called the air.

(11):

(n.) The peculiar look, appearance, and bearing of a person; mien; demeanor; as, the air of a youth; a heavy air; a lofty air.

(12):

(n.) Peculiar appearance; apparent character; semblance; manner; style.

(13):

(n.) An artificial or affected manner; show of pride or vanity; haughtiness; as, it is said of a person, he puts on airs.

(14):

(n.) The representation or reproduction of the effect of the atmospheric medium through which every object in nature is viewed.

(15):

(n.) That which surrounds and influences.

(16):

(n.) To expose for the sake of public notice; to display ostentatiously; as, to air one's opinion.

(17):

(n.) To expose to heat, for the purpose of expelling dampness, or of warming; as, to air linen; to air liquors.

(18):

(n.) Symbolically: Something unsubstantial, light, or volatile.

(19):

(n.) The fluid which we breathe, and which surrounds the earth; the atmosphere. It is invisible, inodorous, insipid, transparent, compressible, elastic, and ponderable.

(20):

(n.) The artificial motion or carriage of a horse.