​ [uncountable] the mixture of gases that surrounds the earth and that we breathe. Let's go out for some fresh air. a blast of hot air. currents of warm air.

1[uncountable] the mixture of gases that surrounds the earth and that we breathe air pollution Let's go out for some fresh air.

Technically, an air is a composition for a single voice or any monophonous instrument, accompanied by other voices or by instruments.

to put clothing, etc. in a place that is warm or has plenty of air so that it dries completely and smells fresh; to be left to dry somewhere.

2[transitive] air something to express your opinions publicly synonym voice The weekly meeting enables employees to air their grievances.

​broadcasting or not broadcasting on television or radio. We will be back on air tomorrow morning at 7. The programme was taken off the air over the summer.

air-to-air adjective /ˌeə tu ˈeə(r)/ /ˌer tu ˈer/ [usually before noun] from one aircraft to another while they are both flying.

This word is now obsolete. It is only recorded in the Middle English period (1150—1500). See meaning & use ...

on-air adjective (in radio and television) being broadcast. She explains how she deals with on-air technical problems. opposite off-air see air.

Definition of air-to-air adjective in Oxford Advanced American Dictionary ... from one aircraft to another while they are both flying an air-to-air missile.