air, under a higher than atmospheric pressure, the expansion force of which is used to operate brakes. Compressed air is also utilised to operate other pneumatic actuation systems such as the throttle, torque_converter and final drive.( see also air brakes).
air at a pressure greater than that of the atmosphere; "compressed air is often used to power machines"
Industrial process air available for control and process uses at 30 to 150 PSI.
Air which has been squeezed into a small space
Air that is at any level of pressure greater than the prevailing atmospheric pressure.