■ noun
1》 the envelope of gases surrounding the earth or another planet.
↘the air in a particular place.
2》 a pervading tone or mood.
↘a pleasurable and interesting or exciting mood.
3》 Physics a unit of pressure equal to mean atmospheric pressure at sea level, 101,325 pascals (roughly 14.7 pounds per square inch).
Derivatives
atmospheric adjective
atmospherical adjective ( archaic ).
atmospherically adverb
Origin
C17: from mod. L. atmosphaera , from Gk atmos 'vapour' + sphaira 'globe'.