What does brake mean?
A brake is a mechanical device designed to slow down or stop a moving vehicle or machine, most commonly by pressing friction pads against wheels or discs to convert motion into heat. The word also functions as a verb — to brake is to apply such a device — and extends figuratively to anything that restrains momentum, as when new regulations 'put the brakes on' an industry. In everyday speech, drivers usually speak of 'the brakes' collectively, whether slamming them hard in an emergency or tapping them gently on a descent. Beyond transport, the term appears in engineering contexts covering everything from bicycles to aircraft, where braking systems are critical safety components. A separate, older sense of 'brake' denotes a dense thicket of ferns or undergrowth, surviving today mostly in literary usage. Distinct from its homophone 'break', the word remains one of the most practical terms in modern English, tied directly to safety and control.
A device for slowing or stopping a vehicle or machine, typically operating by friction against wheels or rotating parts.
"The mechanic replaced the worn brake pads before the road trip."
Usually pluralized as 'brakes' when referring to a vehicle's complete stopping system.
To slow down or come to a stop by applying a brake.
"She braked sharply as a deer darted across the road."
The plural 'brakes' is standard when referring to a vehicle's stopping system as a whole; the singular 'brake' refers to an individual device or the act of braking.
"New brakes made the old truck feel much safer on steep descents."
The brake got its name because early stopping devices quite literally 'broke' a wheel's motion — the word comes from the same root as 'break'.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of brake
The word 'brake' entered English via Middle Low German or Dutch 'brake' (a stopping device or lever), and is ultimately connected to the verb 'break' — early devices were so named because they broke or checked motion. It was well established in English by the late eighteenth century as railways made mechanical stopping systems essential. A distinct noun 'brake', meaning a thicket or an area of ferns, has a separate Old English origin, and another obsolete 'brake' named a machine for crushing flax.
Related word forms
How brake is actually used
Almost always used in the plural 'the brakes' when referring to a car's stopping system as a whole, even though each wheel typically has its own brake. The figurative use ('put the brakes on') is common in journalism and business writing. The archaic senses relating to fern thickets and flax-crushing machinery survive mainly in historical or literary contexts.
Easily confused with brake
A brake is a device for slowing or stopping movement, while break means to shatter, interrupt, or a pause/rest.