the invisible gaseous substance surrounding the earth, a mixture mainly of oxygen and nitrogen.
The surface tension of water is increased, and even the density of air surrounding the Earth ebbs and flows like the tides in the sea.
an impression of a quality or manner given by someone or something.
she answered with a faint air of boredom
a tune or short melodious composition, typically a song.
In the 17th century popular ballads were sung to the traditional airs ; these were published in great numbers during the 18th century.