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.

    ↘[as modifier] indicating the use of aircraft.

    ↘the earth's atmosphere as a medium for transmitting radio waves.

3》 one of the four elements in ancient and medieval philosophy and in astrology.

4》 a breeze or light wind.

5》 (air of) an impression of (a quality or manner).

    ↘(airs) an affected and condescending manner.

6》 a tune or short melodious song.

verb

1》 express (an opinion or grievance) publicly.

    ↘broadcast (a programme) on radio or television.

2》 expose (a room) to the open air.

    ↘Brit. put (washed laundry) in the open air or a warm place to remove dampness.

Phrases

airs and graces Brit. an affectation of superiority.

in the air noticeable all around.

on (or off) the air being (or not being) broadcast on radio or television.

take the air go out of doors.

up in the air unresolved.

walk (or tread) on air feel elated.

Derivatives

airing noun

airless adjective

airlessness noun

Origin

ME: from OFr. air, from L. aer, from Gk aēr; sense 5 prob. from OFr. aire 'site, disposition'; sense 6 from Ital. aria.