brake fluid

noun Automotive.

the fluid used in a brake system to transmit pressure from the brake pedal to the pistons at each wheel, producing the braking action.

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British Dictionary definitions for brake fluid

brake fluid

noun

an oily liquid used to transmit pressure in a hydraulic brake or clutch system

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