denver boot
Word family
- boot (verb)verbB2
- wheel clampnounB1
- clamp (verb)verbB1
Synonym discussion
Sense: noun/1
All three terms describe a device that stops a parked car from moving. 'Wheel clamp' is the dominant term in British and Australian English — it appears on official signage and in traffic law documents. 'Parking boot' is the informal American alternative, used mainly in spoken conversation rather than in written regulations. 'Wheel lock' is the broadest term: it can refer to any mechanism that prevents a wheel from turning, including anti-theft steering-wheel locks and industrial safety locks. If you are writing for a UK audience, choose 'wheel clamp'; in US contexts, 'Denver boot' or 'parking boot' sounds more natural. 'Denver boot' is slightly more formal than 'parking boot' and is the term most municipal parking authorities use in their printed notices.
Common collocations
Etymology
The device is named after the city of Denver, Colorado, where it was first introduced in the 1950s as a tool for enforcing parking rules. The name 'boot' comes from the idea that the device 'boots' or blocks the car, much like a heavy boot on a person's foot would slow them down. Over time the name spread to other US cities and is now used internationally, though many countries prefer the term 'wheel clamp'.
First known use
1968
1968, in the meaning defined above