compressed air

The definition of compressed air is air that is under pressure greater than atmospheric pressure.

(noun)

An example of compressed air is air used for braking systems on railroads.

See compressed air in Webster's New World College Dictionary

air held under pressure in a container: the force generated when the air is released is used to operate machines, tools, etc.

See compressed air in American Heritage Dictionary 4

noun

Air under greater than atmospheric pressure, especially when used to power a mechanical device or to provide a portable supply of oxygen.

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