noun

 

gas the mixture of gases around the Earth which we breathe

air pollution

 

travel travel in an aircraft

I like travelling by air.

 

quality a particular appearance or quality

He has an air of authority.

 

verb

 

broadcast to broadcast something on radio or television

 

room to make a room smell better by opening a door or window

 

clothes If clothes air, or if you air them, you hang them up with a lot of air around them.