air brake: meaning, definition, pronunciation and examples
C1/C2Technical/Industrial/Specialist
Quick answer
What does “air brake” mean?
A braking system, typically on large vehicles (trucks, buses, trains), that uses compressed air to apply pressure to the brake pads or shoes.
Audio
Pronunciation
Definition
Meaning and Definition
A braking system, typically on large vehicles (trucks, buses, trains), that uses compressed air to apply pressure to the brake pads or shoes.
A device used to control speed or motion by creating resistance using air; in aeronautics, a deployable flap on an aircraft used to increase drag and reduce speed.
Dialectal Variation
British vs American Usage
Differences
No significant lexical difference. Usage is identical across both varieties.
Connotations
Strongly associated with heavy goods vehicles (HGVs), public transport, and railways.
Frequency
Slightly higher frequency in American English due to larger road freight industry, but core usage identical.
Grammar
How to Use “air brake” in a Sentence
The [vehicle] has air brakes.The driver applied the air brake.The [system] is operated by air brakes.Vocabulary
Collocations
Examples
Examples of “air brake” in a Sentence
noun
British English
- The lorry's air brake failed on the motorway.
- All new coaches must be fitted with a dual-circuit air brake system.
American English
- The truck's air brake was inspected during the weigh station stop.
- He got his commercial license after passing the air brake endorsement test.
verb
British English
- The driver air-braked smoothly to avoid the hazard.
- The system is designed to air-brake automatically in an emergency.
American English
- The engineer air-braked the train as it approached the station.
- New models can air-brake more efficiently.
Usage
Meaning in Context
Business
In logistics and transport company operations manuals.
Academic
In engineering textbooks on vehicle design or fluid mechanics.
Everyday
Rare; used by professional drivers, mechanics, or enthusiasts.
Technical
Central term in automotive, railway, and aerospace engineering.
Vocabulary
Synonyms of “air brake”
Strong
Neutral
Weak
Vocabulary
Antonyms of “air brake”
Watch out
Common Mistakes When Using “air brake”
- Using 'air brake' to refer to standard car brakes (which are usually hydraulic).
- Confusing 'air brake' (vehicle system) with 'spoiler' or 'speed brake' (on aircraft).
FAQ
Frequently Asked Questions
No, ordinary cars typically use hydraulic brake systems. Air brakes are used on heavy vehicles like trucks, buses, and trains where greater braking force is required.
Its key advantage is that it can produce a very powerful braking force suitable for heavy loads, and it is generally more reliable for large, multi-axle vehicles because compressed air can be transported over longer distances without significant loss of pressure.
Yes, in aviation, 'air brake' (or speed brake/spoiler) refers to a device on the aircraft's wings or fuselage that extends to increase drag and reduce speed, especially during landing.
In many countries, yes. Operating commercial vehicles with air brakes requires a specific endorsement or license category, as the systems are more complex and failure modes are different from hydraulic brakes.
A braking system, typically on large vehicles (trucks, buses, trains), that uses compressed air to apply pressure to the brake pads or shoes.
Air brake is usually technical/industrial/specialist in register.
Air brake: in British English it is pronounced /ˈeə breɪk/, and in American English it is pronounced /ˈer breɪk/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “Pull the air brake (to stop suddenly or decisively).”
Learning
Memory Aids
Mnemonic
Think: AIR powers the BRAKE to stop a big truck. Big vehicle needs big air to stop.
Conceptual Metaphor
AIR AS FORCE (compressed air provides the controlling force).
Practice
Quiz
In which context is 'air brake' LEAST likely to be used?