atmosphere

(noun) a particular environment or surrounding influence. Synonyms: ambiance, ambience. Example: "There was an atmosphere of excitement."

(noun) a unit of pressure: the pressure that will support a column of mercury 760 mm high at sea level and 0 degrees centigrade. Synonyms: standard atmosphere, atm, standard pressure.

(noun) the mass of air surrounding the Earth. Synonyms: air. Examples: "There was great heat as the comet entered the atmosphere." "It was exposed to the air."

(noun) the weather or climate at some place. Synonyms: atmospheric state. Example: "The atmosphere was thick with fog."

(noun) the envelope of gases surrounding any celestial body.

(noun) a distinctive but intangible quality surrounding a person or thing. Synonyms: air, aura. Examples: "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."