Main Entry: at·mo·sphere

Pronunciation: \ˈat-mə-ˌsfi(ə)r\

Function: noun

1 : the whole mass of air surrounding the earth
2 : the air of a locality
3 : a unit of pressure equal to the pressure of the air at sea level or to 101,325 pascals or to approximately 14.7 pounds per square inch

—at·mo·spher·ic \ˌat-mə-ˈsfi(ə)r-ik, -ˈsfer-\ adjective