Pronunciation: (dē-presh'u-rīz"), [key]
—v., -ized, -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.
to lose air pressure: The airplane cabin depressurized almost instantly. Also, esp. Brit.,de•pres'sur•ise".
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.