atmosphere

noun

1. a particular environment or surrounding influence"there was an atmosphere of excitement"
2. a unit of pressure: the pressure that will support a column of mercury 760 mm high at sea level and 0 degrees centigrade
3. the mass of air surrounding the Earth"there was great heat as the comet entered the atmosphere"
4. the weather or climate at some place"the atmosphere was thick with fog"
5. the envelope of gases surrounding any celestial body
6. a distinctive but intangible quality surrounding a person or thing"an air of mystery"