[ dee-kuhm-pres ]

verb (used with object)
  1. to cause to undergo decompression.

verb (used without object)
  1. to undergo decompression.

  2. Informal. to relax; unwind.

Origin of decompress

1900–05; translation of French décomprimer.See de-, compress

Other words from decompress

  • de·com·pres·sive, adjective

Words Nearby decompress Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use decompress in a sentence

British Dictionary definitions for decompress


/ (ˌdiːkəmˈprɛs) /

  1. to relieve (a substance) of pressure or (of a substance) to be relieved of pressure

  2. to return (a diver, caisson worker, etc) to a condition of normal atmospheric pressure gradually from a condition of increased pressure or (of a diver, etc) to be returned to such a condition

Derived forms of decompress

  • decompression, noun
  • decompressive, adjective

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