depressurizev.
transitive. To cause an appreciable drop in the pressure of the gas inside (a container, etc.), esp. to a natural level from an artificially sustained level (in quot. 1960, to subject to decompression: cf. decompress v. a).
ΘΚΠ
the world > matter > gas > air > [verb (transitive)] > compress, etc. (air, gas, or container)
compressa1676
recompress1873
decompress1905
pressurize1940
depressurize1944
repressurize1947
pressure1961
1944 Aviation July 278/3 While in action, the cabin is de-pressurized and demand oxygen employed.
1958 Daily Mail 12 Nov. 4/5 There was a hissing sound as Larry helped him depressurise the airlock.
1960 A. Koestler Lotus & Robot vi. 188 They cannot go back into the pressure chamber to dissolve the bubbles by getting gradually depressurized.
Derivatives
deˈpressurized adj.
ΚΠ
1947 Jrnl. Royal Aeronaut. Soc. 51 972/1 This altitude was the maximum at which it was reasonably possible for a fit pilot to retain sufficient control to make a normal descent, should the cabin for any reason become de-pressurised.
1963 Times 24 May 12/7 An Aer-Lingus Viscount..made an emergency dive of 12,000 ft. today after a door unfastened and the passenger cabin became depressurized.
This entry has not yet been fully updated (first published 1972; most recently modified version published online June 2019).
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v.1944