(noun)

1. the quality, production, expression, or realm, according to aesthetic principles, of what is beautiful, appealing, or of more than ordinary significance.
2. the class of objects subject to aesthetic criteria; works of art collectively, as paintings, sculptures, or drawings: a museum of art; an art collection. See fineart, commercial art.
   3. a field, genre, or category of art: Dance is an art.
   4. the fine arts  collectively, often excluding architecture: art and architecture.
3. any field using the skills or techniques of art: advertising art; industrial art.

air

(noun)

1. a mixture of nitrogen, oxygen, and minute amounts of other gases that surrounds the earth and forms its atmosphere.
2. a stir in the atmosphere; a light breeze.
3. overhead space; sky: The planes filled the air.
4. circulation; publication; publicity: to give air to one’s theories.
5. the general character or complexion of anything; appearance: His early work had an air of freshness and originality.