The whole mass of aeriform fluid surrounding the earth;
– applied also to the gaseous envelope of any celestial orb, or other
body; as, the atmosphere of Mars.

Any gaseous envelope or medium.

A supposed medium around various bodies; as, electrical
atmosphere, a medium formerly supposed to surround electrical bodies.

The pressure or weight of the air at the sea level, on
a unit of surface, or about 14.7 Ibs. to the sq. inch.

Any surrounding or pervading influence or condition.

The portion of air in any locality, or affected by a
special physical or sanitary condition; as, the atmosphere of the room;
a moist or noxious atmosphere.