Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “flash”

flash

verb uk   /flæʃ/ us  

flash verb (SHINE SUDDENLY)

B2 [I or T] to shine brightly and suddenly, or to make something shine in this way: Stop flashing that light in my eyes! The lightning flashed and distant thunder rolled. You'd better slow down, that car was flashing (its lights) at you. [I] literary If someone's eyes flash, they look bright because of the anger or excitement the person is feeling.

flash verb (MOVE FAST)

C2 [I usually + adv/prep] to move very fast: They flashed past/by on a motorcycle.

flash verb (SHOW QUICKLY)

C2 [T] to show something for a short time: He flashed a smile and offered to buy me a drink. [I or T] informal If a man flashes, he shows his sexual organs in public: He came out of the bushes and flashed at me.

flash verb (COMMUNICATE)

[T usually + adv/prep] to communicate something quickly, especially using radio or light waves: Within moments of an event happening, the news can be flashed around the world.

flash verb (SUDDEN EXPERIENCE)

[I + adv/prep] If something flashes through/across your mind, you suddenly or quickly think of it: The thought suddenly flashed through my mind that she didn't want to be here.

flash

noun uk   /flæʃ/ us  

flash noun (BRIGHT LIGHT)

B2 [C] a sudden bright light that quickly disappears: a flash of lightning The bomb exploded in a flash of yellow light.

flash noun (SUDDEN EXPERIENCE)

CB [C usually singular] a sudden, powerful emotional or mental experience: The idea came to her in a flash of inspiration/genius.

flash noun (PHOTOGRAPHY)

B2 [C or U] the device or system used to produce a bright light for a short time when taking a photograph: Where's the flash for the camera? It's quite dark in here, I'll have to use flash.

flash noun (MILITARY SIGN)

[C] UK a small object or piece of material worn on a military uniform as a sign of rank, or (on clothing) a strip or mark of colour different from the main colour

flash noun (QUICK LOOK)

[C] humorous a quick look at something: She leaned over and I caught a flash of pink underwear.

flash

adjective uk   /flæʃ/ UK us  
looking expensive in a way that attracts attention: That's a very flash suit he's wearing.
(Definition of flash from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of flash?
Add Cambridge dictionaries to your browser to your website

Definitions of “flash” in other dictionaries

Word of the Day

long time no see

said when you meet someone who you haven't seen for a long period of time

Word of the Day

Come on – you can do it! Phrasal verbs with ‘come’.

by Liz Walter​,
November 19, 2014
As part of an occasional series on the tricky subject of phrasal verbs, this blog looks at ones formed with the verb ‘come’. If you are reading this blog, I’m sure you already know come from, as it is one of the first things you learn in class: I come from Scotland/Spain.

Read More 

silver splicer noun

November 17, 2014
informal a person who marries in later life Newly retired and now newlywed – rise of the ‘silver splicers’ Reaching pension age becomes a trigger to tie the knot as baby-boomers begin to redefine retirement

Read More