Dictionary.com

air brake

Save This Word!

noun

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.

QUIZZES

QUIZ YOURSELF ON “ITS” VS. “IT’S”!

Apostrophes can be tricky; prove you know the difference between it’s and its in this crafty quiz!
Question 1 of 12
On the farm, the feed for chicks is significantly different from the roosters’; ______ not even comparable.

Origin of air brake

An Americanism dating back to 1870–75
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for air brake

air brake

noun

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
Get Online Help For Kids!