<p><strong>Verb (used with object)</strong></p><ul><li>to raise the internal atmospheric pressure of to the required or desired level: to pressurize an astronaut's spacesuit before a walk in space</li><li>to maintain normal air pressure in (the cockpit or cabin of an airplane) at high altitudes</li><li>to apply pressure to (a gas or liquid); supercharge</li><li>to pressure-cook</li></ul>