a brake or system of brakes operated by compressed air.
Aeronautics. a device for reducing the air speed of an aircraft by increasing its drag.
a device for stopping the sails of a windmill by disrupting the flow of air around them.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use air brake in a sentence
Johnson Welded Products Ohio-based manufacturer of reservoirs for air brake systems.
Johnson Welded Products Ohio-based manufacturer of reservoirs for air brake systems.After Hobby Lobby, These 82 Corporations Could Drop Birth Control Coverage | Abby Haglage | June 30, 2014 | THE DAILY BEAST
George Westinghouse, Jr., about thirty years ago, took out a patent for the air brake.American Inventions and Inventors | William A. Mowry
Never rely on the air brake to hold the train for any length of time.The Traveling Engineers' Association | Anonymous
The control valve takes no part in the application or release of the straight air brake.The Traveling Engineers' Association | Anonymous
However, Westinghouse was not discouraged, but continued to experiment, and the air-brake as we have it to-day was the result.American Men of Mind | Burton E. Stevenson
Up to that time the air-brake had never been used upon the Rome, Watertown & Ogdensburgh.The Story of the Rome, Watertown, and Ogdensburg RailRoad | Edward Hungerford
British Dictionary definitions for air brake
a brake operated by compressed air, esp in heavy vehicles and trains
Also called: dive brake an articulated flap or small parachute for reducing the speed of an aircraft
a rotary fan or propeller connected to a shaft to reduce its speed
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