air

air ► NOUN 1) the invisible gaseous substance surrounding the earth, a mixture mainly of oxygen and nitrogen. 2) the open space above the surface of the earth. 3) (before another noun ) indicating the use of aircraft: air travel. 4) the earth's atmosphere as a medium for transmitting radio waves. 5) one of the four elements (air, earth, fire, and water) in ancient and medieval philosophy and in astrology. 6) Music a tune or short melodious composition. 7) (an air of) an impression of. 8) (airs) an affected and condescending manner.

► VERB 1) express (an opinion or grievance) publicly. 2) broadcast (a programme) on radio or television. 3) expose to fresh or warm air.

● airs and graces — Cf. ↑airs and graces

● in the air — Cf. ↑in the air

● on (or off) the air — Cf. ↑on the air

● take the air — Cf. ↑take the air

● up in the air — Cf. ↑up in the air

● walk (or tread) on air — Cf. ↑walk on air

DERIVATIVES airless adjective.

ORIGIN Greek ar.