GNU Collaborative International Dictionary of English

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Found one definition

1.       
   Atmosphere , n. [Gr.  vapor (akin to Skr. ātman breath, soul, G. athem breath) +  sphere: cf. F. atmosphère. See Sphere.]
   (Physics) (a) The whole mass of aëriform fluid surrounding the earth; -- applied also to the gaseous envelope of any celestial orb, or other body; as, the atmosphere of Mars. (b) Any gaseous envelope or medium.
   1913 Webster
   An atmosphere of cold oxygen.
   Miller.
   
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   A supposed medium around various bodies; as, electrical atmosphere, a medium formerly supposed to surround electrical bodies.
   Franklin.
   
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   The pressure or weight of the air at the sea level, on a unit of surface, or about 14.7 lbs. to the sq. inch.
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   Hydrogen was liquefied under a pressure of 650 atmospheres.
   Lubbock.
   
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   Any surrounding or pervading influence or condition.
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   The chillest of social atmospheres.
   Hawthorne.
   
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   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.
   1913 Webster