[ presh-uh-rahyz ]
See synonyms for pressurize on
verb (used with object),pres·sur·ized, pres·sur·iz·ing.
  1. to raise the internal atmospheric pressure of to the required or desired level: to pressurize an astronaut's spacesuit before a walk in space.

  2. to maintain normal air pressure in (the cockpit or cabin of an airplane) at high altitudes.

  1. to apply pressure to (a gas or liquid); supercharge.

  2. to pressure-cook.

Origin of pressurize

First recorded in 1940–45; pressure + -ize
  • Also especially British, pres·sur·ise .

Other words from pressurize

  • pres·sur·iz·er, noun
  • re·pres·su·rize, verb, re·pres·su·rized, re·pres·su·riz·ing. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

British Dictionary definitions for pressurize



/ (ˈprɛʃəˌraɪz) /

  1. to increase the pressure in (an enclosure, such as an aircraft cabin) in order to maintain approximately atmospheric pressure when the external pressure is low

  2. to increase pressure on (a fluid)

  1. to make insistent demands of (someone); coerce

Derived forms of pressurize

  • pressurization or pressurisation, noun
  • pressurizer or pressuriser, noun

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012