Cars & Driving
- noun pressure exerted by the atmosphere at the earth’s surface
- The pressure (14.7 psi) exerted by the earth's atmosphere at sea level under standard conditions.
- The pressure which the atmosphere exerts at any given point within it. This pressure is due to the weight of the gases that compose it. Also called barometric pressure.
- A pressure equal to exactly 1 atmosphere, which is equal to 101.325 kilopascals, 1013.25 millibars, or 760 millimeters of mercury.