atmosphere

at·mo·sphere

noun \ˈat-mə-ˌsfi(ə)r\

Definition of ATMOSPHERE

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