red light
B1Neutral to informal
Definition
Meaning
A traffic signal showing a red lamp, indicating that vehicles must stop.
A signal to stop or a warning to cease an activity; can also refer to a red lamp (e.g., outside a brothel, in photography). Metaphorically, a sign of danger, prohibition, or rejection.
Linguistics
Semantic Notes
Primarily a compound noun. Can be hyphenated ('red-light') when used attributively (e.g., a red-light district).
Dialectal Variation
British vs American Usage
Differences
Generally identical. The term 'red-light camera' (for traffic enforcement) is more common in American English but understood in British English.
Connotations
Similar connotations. The phrase 'run a red light' is standard in both varieties.
Frequency
Equally common in both dialects.
Vocabulary
Collocations
Grammar
Valency Patterns
V + a red light (e.g., see/run/stop at/ignore)Adj + red light (e.g., flashing/blinking)N + red light (e.g., traffic red light)Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “see the red light (to realise danger is ahead)”
- “give someone the red light (to reject or stop someone)”
Usage
Context Usage
Business
Metaphorically: 'The project got a red light from the board.' (was rejected/stopped).
Academic
Rare in technical writing except in studies on traffic systems, urban planning, or metaphor analysis.
Everyday
Very common in the context of driving and traffic.
Technical
In photography: the safe light in a darkroom. In aviation/rail: a signal to stop.
Examples
By Part of Speech
verb
British English
- The car was caught red-lighting by the new camera.
American English
- He red-lighted the intersection and got a ticket.
adverb
British English
- (Not standard; no common adverbial use)
American English
- (Not standard; no common adverbial use)
adjective
British English
- He was fined for a red-light violation.
American English
- The city installed more red-light cameras.
Examples
By CEFR Level
- The car stopped at the red light.
- The red light means 'stop'.
- Never drive through a red light.
- I saw the red light and slowed down.
- The proposal was given a red light due to budget concerns.
- He was fined for running a red light captured on camera.
- The sudden economic data was a red light for investors, prompting a sell-off.
- The study analysed accident rates at red-light intersections.
Learning
Memory Aids
Mnemonic
Think of RED = STOP, like a red stop sign. The colour red is associated with danger and stopping in many cultures.
Conceptual Metaphor
STOPPING/REJECTION IS A RED LIGHT; DANGER IS A RED LIGHT; PROHIBITION IS A RED SIGNAL.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid literal translation for idioms. 'Дать красный свет' in Russian means 'to give the green light' (permission), which is the OPPOSITE of the English metaphor. In English, 'a red light' means stop/rejection.
- The compound 'red-light district' has a specific cultural meaning (area with sex businesses) that may not be directly inferrable from the words.
Common Mistakes
- Using 'red light' to mean permission (a common false friend for speakers of some Slavic languages).
- Incorrect hyphenation: 'We entered a red light district' (correct as shown) vs. 'We entered a red-light-district' (incorrect).
Practice
Quiz
What does 'seeing a red light' metaphorically mean in a business context?
FAQ
Frequently Asked Questions
It is typically written as two words ('red light'). It is hyphenated when used as an attributive adjective before a noun (e.g., 'red-light camera').
'Red light' is a metaphor for stopping, prohibition, or rejection. 'Green light' is the opposite—a metaphor for permission, approval, or the signal to proceed.
Informally, especially in American English, it can be used as a verb meaning 'to run a red light' (e.g., 'He red-lighted at the intersection'). This usage is casual and not universally accepted in formal writing.
It is a part of a city where there is a concentration of businesses related to the sex industry (e.g., brothels, strip clubs). The term originates from the red lights historically used as signs for such establishments.