Air

Noun
air  ‎(countable and uncountable, plural airs)
 * 1) (uncountable, historical, astrology, alchemy, sciences) The atmospheric substance above the surface of the earth which animals breathe, formerly considered to be a single substance, one of the four basic elements of ancient philosophy and one of the five basic elements of several Eastern traditions.
 * 2) (uncountable, physics, meteorology) That substance, now understood as the mixture of gases comprising the earth's atmosphere.

Etymology
From English: air

Pronunciation
/e:r/

Noun
Air
 * 1) Air