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See more synonyms for depressurize on Thesaurus.com
verb (used with object), de·pres·sur·ized, de·pres·sur·iz·ing.
  1. to remove the air pressure from (a pressurized compartment of an aircraft or spacecraft).
  2. to relieve the tensions of; cause to relax: A week's vacation should depressurize me.
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verb (used without object), de·pres·sur·ized, de·pres·sur·iz·ing.
  1. to lose air pressure: The airplane cabin depressurized almost instantly.
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Also especially British, de·pres·sur·ise.

Origin of depressurize

First recorded in 1940–45; de- + pressurize
Related formsde·pres·sur·i·za·tion, nounde·pres·sur·iz·er, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for depressurize



  1. (tr) to reduce the pressure of a gas inside (a container or enclosed space), as in an aircraft cabin
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Derived Formsdepressurization or 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