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[dee-presh-uh-rahyz] /diˈprɛʃ əˌraɪz/
verb (used with object), depressurized, depressurizing.
to remove the air pressure from (a pressurized compartment of an aircraft or spacecraft).
to relieve the tensions of; cause to relax:
A week's vacation should depressurize me.
verb (used without object), depressurized, depressurizing.
to lose air pressure:
The airplane cabin depressurized almost instantly.
Also, especially British, depressurise.
Origin of depressurize
1940-45; de- + pressurize
Related forms
depressurization, noun
depressurizer, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for depressurize
  • If a leak is detected, close the cylinder valve and depressurize the regulator before attempting to fix the leak.
  • They depressurize the hydraulic system and make sure that all electrical safety grounds are in place.
  • The current practice for recovering coal bed methane is to depressurize the bed, usually by pumping water out of the reservoir.
  • He or she uses a blower door to depressurize the house to determine how tight it is and to check for air leaks.
  • The tanks will be used to pressurize and depressurize the new airlock.
  • depressurize sprayers before carrying out maintenance.
  • Safety injection was demanded and subsequently the plant had to depressurize and cool down.
British Dictionary definitions for depressurize


(transitive) to reduce the pressure of a gas inside (a container or enclosed space), as in an aircraft cabin
Derived Forms
depressurization, depressurisation, 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
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