tail-light
B1Everyday, Informal, Technical (Automotive)
Definition
Meaning
A red light, usually one of a pair, at the rear of a vehicle, which illuminates when the vehicle's lights are on.
The section of the light assembly at the rear of a vehicle; by extension, sometimes used figuratively to denote a following or trailing element that signals position.
Linguistics
Semantic Notes
Primarily refers to the light itself, but can metonymically refer to the entire assembly/housing. Often pluralised (tail-lights) even when referring to a single vehicle.
Dialectal Variation
British vs American Usage
Differences
In British English, 'tail-light' (with hyphen) and the solid form 'taillight' are both used, but 'rear light' is a very common synonym. In American English, 'taillight' (one word) is dominant, and 'tail light' (two words) is also common. The hyphenated form is less frequent in AmE.
Connotations
No significant difference in connotation. Slightly more technical/formal feel to 'rear light' (BrE).
Frequency
In AmE, 'taillight' is the high-frequency term. In BrE, 'tail-light'/'taillight' and 'rear light' are in strong competition, with 'rear light' perhaps more frequent in formal/technical contexts (e.g., vehicle manuals).
Vocabulary
Collocations
Grammar
Valency Patterns
The tail-light [is broken].[Verb] the tail-light (e.g., fix, replace, check).See [object's] tail-light (e.g., the car's tail-light).Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “[Rare/Figurative] To be on someone's tail-light: to be following closely behind them.”
Usage
Context Usage
Business
Used in automotive retail, insurance, and repair contexts (e.g., 'Cost of tail-light replacement').
Academic
Rare; might appear in engineering or design papers on vehicle lighting systems.
Everyday
Very common in discussions about vehicle maintenance, traffic incidents, or driving (e.g., 'Your left tail-light is out.').
Technical
Standard term in automotive manuals, MOT/vehicle inspection terminology, and parts catalogues.
Examples
By Part of Speech
verb
British English
- The cyclist was tail-lighted by a considerate driver.
adjective
British English
- The tail-light assembly was damaged.
American English
- We need a new taillight housing.
Examples
By CEFR Level
- The car has a red tail-light.
- I can see the tail-light of the bus.
- The police officer told me my tail-light was broken.
- We followed the truck's tail-lights through the fog.
- After the minor collision, only the tail-light casing needed to be replaced.
- Regulations require that tail-lights be visible from a distance of 100 metres.
- The new model features LED tail-lights with a distinctive sequential turn signal.
- Her thesis involved optimising the photometric performance of automotive tail-lights.
Learning
Memory Aids
Mnemonic
Think of the TAIL end of a car, where the TAIL-LIGHT shines. It's at the back, like a tail.
Conceptual Metaphor
THE REAR OF A VEHICLE IS A TAIL (hence tail-gate, tail-light). LIGHT IS A SIGNAL/BEACON.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid direct calque 'хвостовой свет' – it is unnatural. The standard terms are 'задний фонарь' or 'габаритный огонь' (the latter specifying the position light function).
Common Mistakes
- Confusing 'tail-light' (always rear, red/white) with 'brake light' (only red, illuminates upon braking) or 'indicator/turn signal' (amber, flashes). Using 'headlight' for the rear light.
Practice
Quiz
Which of the following is a primary function of a tail-light?
FAQ
Frequently Asked Questions
Both are accepted. American English strongly prefers 'taillight' as one word. British English uses 'tail-light' (hyphenated) and 'taillight', but also commonly uses the synonym 'rear light'.
A tail-light is on whenever the vehicle's headlights are on, making the car visible from behind. A brake light is brighter and only illuminates when the brake pedal is pressed. Often they are in the same housing unit but use different bulbs/LEDs.
Yes, in most jurisdictions it is a traffic violation to drive with a non-functioning tail-light, as it reduces your vehicle's visibility to other drivers.
Yes, they are synonyms. 'Lamp' can refer more to the physical unit or bulb, while 'light' refers to the illumination, but in everyday use they are interchangeable.