Dictionary.com

water jacket

noun

a water-filled casing or compartment used to water-cool something, as an engine or machine gun.

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Origin of water jacket

First recorded in 1865–70

Words nearby water jacket

watering hole, watering place, watering pot, water intoxication, waterish, water jacket, waterjet, water jump, water key, water-laid, waterleaf

Definition for water jacket (2 of 2)

water-jacket
[ waw-ter-jak-it, wot-er- ]
/ ˈwɔ tərˌdʒæk ɪt, ˈwɒt ər- /

verb (used with object)

to surround or fit with a water jacket.

Origin of water-jacket

First recorded in 1875–80
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for water jacket

British Dictionary definitions for water jacket

water jacket

noun

a water-filled envelope or container surrounding a machine, engine, or part for cooling purposes, esp the casing around the cylinder block of a pump or internal-combustion engineCompare air jacket
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