flash
C1Informal and formal depending on context (e.g., 'flash flood' is formal/technical; 'in a flash' is informal).
Definition
Meaning
To produce a sudden, brief, and intense burst of light.
A very brief moment; a sudden display of something; or to move, appear, or happen very quickly.
Linguistics
Semantic Notes
As a noun, it can refer to the light itself, the camera device, or a brief moment in time. As a verb, it implies speed and brevity, but also ostentatious display (e.g., 'flash his money').
Dialectal Variation
British vs American Usage
Differences
In British English, 'flash' can informally mean 'ostentatious' (e.g., a flash car). 'Flash' is the common UK term for a camera's flash unit, while US may also use 'flashbulb' or 'flashgun' more specifically in photography contexts. The phrasal verb 'flash back' (as a noun 'flashback') is standard in both; 'flash forward' is less established but understood.
Connotations
In both varieties, 'flash' can have a slightly negative connotation when referring to someone showing off ('He's a bit flash').
Frequency
Used with similar high frequency in both varieties. The interjection 'Flash!' (as in comic books) is equally common.
Vocabulary
Collocations
Grammar
Valency Patterns
flash + object (He flashed his badge)flash + at + object (She flashed a smile at him)flash + across/through/past + object (An idea flashed through his mind)flash + on/off (The lights flashed on and off)Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “in a flash”
- “flash in the pan”
- “flash your eyes at someone”
Usage
Context Usage
Business
Refers to a very short-term offer or trend (e.g., 'flash sale'). In tech, 'flash memory' or 'flash drive'.
Academic
Used in psychology ('flashbulb memory'), computing ('flash storage'), and meteorology ('flash flood').
Everyday
Common for describing quick actions, light, or brief moments ('I'll be back in a flash').
Technical
In photography ('flash unit'), computing ('Flash memory'), and electrical engineering ('flashover').
Examples
By Part of Speech
verb
British English
- He flashed his headlights to warn the oncoming driver.
- The news flashed across the television screens.
- She flashed a wad of cash, which was a bit vulgar.
American English
- The police officer flashed his badge at the entrance.
- A thought flashed through my mind.
- The runner flashed past the finish line.
adverb
British English
- It happened flash quick. (Very informal/rare)
adjective
British English
- He drives a very flash sports car.
- It was a bit of a flash hotel for my tastes.
- She made a flash entrance at the party.
American English
- The thief used some flash distraction technique.
- They lived a flash lifestyle for a while.
- It's a flashy (more common) new restaurant downtown.
Examples
By CEFR Level
- The lightning flashed during the storm.
- I saw a flash of light in the sky.
- The camera needs a flash in the dark room.
- An idea suddenly flashed into her head.
- He flashed a quick smile at the audience.
- The whole incident was over in a flash.
- The report flashed up on my computer screen as a priority.
- Memories of that day flashed before her eyes.
- His career was brilliant but brief, a real flash in the pan.
- The data is stored on a solid-state drive using flash memory.
- The novel uses a complex narrative structure with frequent flashbacks.
- Investors were wary of the company's flash sales strategy, fearing it devalued the brand.
Learning
Memory Aids
Mnemonic
Think of a camera's FLASH – it's FAST and LIGHT lasts only A SHort time.
Conceptual Metaphor
TIME IS LIGHT (A flash of time). UNDERSTANDING IS SEEING (A flash of insight).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Not 'флешка' (which is a flash drive). The word 'flash' alone is not the device.
- Avoid translating 'in a flash' literally; use мгновенно/в мгновение ока.
- 'Flash' as a verb of movement (The car flashed past) is often better as промчаться/мелькнуть.
Common Mistakes
- Using 'flash' as a countable noun for the device ('a flash') is fine, but 'flash drive' is more specific. Confusing 'flash' (brief light/event) with 'flare' (longer, spreading light/situation).
Practice
Quiz
In the idiom 'a flash in the pan', what does 'flash' metaphorically represent?
FAQ
Frequently Asked Questions
It depends on the context. Technical terms like 'flash flood' or 'flash memory' are formal. Idioms like 'in a flash' are informal. Using 'flash' to mean 'show off' ('flash his money') is informal and often negative.
'Flash' is a sudden, brief burst. 'Glare' is a strong, steady, and unpleasant light. 'Glint' is a small flash of light, often reflected from a hard surface.
Yes. It's commonly used for quick movement ('The car flashed past'), brief displays of emotion ('a flash of anger'), and sudden ideas ('a flash of inspiration').
It is standard as one word (noun: 'He had a flashback'; verb: 'The film flashes back to 1990'). 'Flash back' as two words is the verb form in some constructions ('His mind would flash back to that day').