Atmospheric Pressure Definition

ătmə-sfîrĭk
noun
Pressure caused by the weight of the atmosphere. At sea level it has a mean value of one atmosphere but reduces with increasing altitude.
American Heritage
The pressure due to the weight of the earth's atmosphere, usually measured by a standard unit.
Webster's New World

(physics, meteorology) The pressure caused by the weight of the atmosphere above an area.

Wiktionary
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Other Word Forms of Atmospheric Pressure

Noun

Singular:
atmospheric pressure
Plural:
atmospheric pressures

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