Definition of "depressurize" []

• To reduce the pressure of air or gas within (a chamber or vehicle, for example). (verb-transitive)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "TransCanada tries to 'depressurize' Keystone XL pipeline bid"
• "Investigators subsequently determined that a defective air-circulation fan—combined with the crew's decision to turn on certain engine and wing anti-ice systems while flying through unusually warm temperatures—caused the plane to quickly depressurize, according to the document posted on the aviation website earlier this week."
• "In designing its planes one of the company's many considerations is that metal flexes and fatigues over time as cabins pressurize and depressurize on each flight."