1. (noun)atmosphere, ambiance, ambience a particularenvironment or surrounding influence "there was an atmosphere of excitement"
2. (noun)standard atmosphere, atmosphere, atm, standard pressure a unit of pressure: the pressure that willsupport a column of mercury 760 mm high at sea level and 0 degrees centigrade
3. (noun)atmosphere, air the mass of air surrounding the Earth "there was great heat as the comet entered the atmosphere"; "it was exposed to the air"
4. (noun)atmosphere, atmospheric state the weather or climate at some place "the atmosphere was thick with fog"
5. (noun)atmosphere the envelope of gases surrounding any celestial body
6. (noun)air, aura, atmosphere a distinctive but intangiblequality surrounding a person or thing "an air of mystery"; "the house had a neglected air"; "an atmosphere of defeat pervaded the candidate's headquarters"; "the place had an aura of romance"