atmosphere Definition

atmosphere
noun

1. The layer of gas surrounding a planet, especially the Earth, and held to it by gravity.
2. The air in a particular place.

Example: the humid atmosphere of the greenhouse
3. The mood of a book, film, painting, piece of music, etc or the general impression that it gives.

Example: the sultry atmosphere of film noir
4. The general or prevailing climate or mood.

Example: an atmosphere of jubilation
Thesaurus: surroundings, environment, ambiance, climate, tenor, mood, tone, feeling, air, spirit, vibrations.
5. A unit of atmospheric pressure, equal to normal air pressure at sea level.

Etymology: 17c: from Greek atmos vapour + sphaira ball.