a brake operated by fluid pressures in cylinders and connecting tubular lines.
Origin of hydraulic brake
First recorded in 1870–75
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
a type of brake, used in motor vehicles, in which the braking force is transmitted from the brake pedal to the brakes by a liquid under pressure
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