[ dee-kuh m-pres ]
/ ˌdi kəmˈprɛs /

verb (used with object)

to cause to undergo decompression.

verb (used without object)

to undergo decompression.
Informal. to relax; unwind.

Origin of decompress

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

Related forms

de·com·pres·sive, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for decompress

British Dictionary definitions for decompress


/ (ˌdiːkəmˈprɛs) /


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

decompression, noundecompressive, 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