- to cool by means of water, especially by water circulating in pipes or a water jacket, as an engine or machine gun.
Origin of water-cool
First recorded in 1895–1900
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- (tr) to cool (an engine, etc) by a flow of water circulating in an enclosed jacketCompare air-cool