Definition of flash noun from the Oxford Advanced Learner's Dictionary

      

    flash

     noun
    noun
    BrE BrE//flæʃ//
     
    ; NAmE NAmE//flæʃ//
     
     
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    light
  1. 1  [countable] a sudden bright light that shines for a moment and then disappears a flash of lightning Flashes of light were followed by an explosion. There was a blinding flash and the whole building shuddered.
  2. signal
  3. 2  [countable] the act of shining a light on something, especially as a signal
  4. in photography
  5. 3  [countable, uncountable] a piece of equipment that produces a bright light for a very short time, used for taking photographs indoors, when it is dark, etc.; the use of this when taking a photograph a camera with a built-in flash I'll need flash for this shot. flash photography
  6. of bright colour
  7. 4  [countable] flash of something the sudden appearance for a short time of something bright a flash of white teeth On the horizon, she saw a flash of silver—the sea!
  8. sudden idea/emotion
  9. 5[countable] flash of something a particular feeling or idea that suddenly comes into your mind or shows in your face a flash of anger/inspiration, etc. When she looked at me, I caught a flash of recognition in her eyes. ‘Did you really win first prize?’ he said with a flash of genuine admiration.
  10. news
  11. 6[countable] = newsflash
  12. on uniform
  13. 7[countable] (British English) a band or small piece of cloth worn on a military uniform to show a person’s rank
  14. on book/pack
  15. 8[countable] a band of colour or writing across a book, pack, etc.
  16. computing
  17. 9 Flash™ [uncountable] a program which creates moving images for websites
  18. Word Origin Middle English (in the sense ‘splash water about’): probably imitative; compare with flush ‘cleanse’ and splash.Extra examples He felt a brief flash of jealousy. I don’t think the picture will come out in this light. Try using the flash. I took it with flash. She had a sudden flash of inspiration. She was experiencing hot flashes as part of menopause. The flash didn’t go off. The flashes from the guns illuminated the sky. We caught a flash of white in the bushes. We were blinded by the flash. a camera with a built-in flash unit a rare flash of humourIdioms a sudden success that lasts only a short time and is not likely to be repeated He needed to prove that his success was not just a flash in the pan. very quickly and suddenly The weekend seemed to be over in a flash. The answer came to me like a flash. very quickly Quick as a flash she was at his side. More Like ThisSimiles in idioms (as) bald as a coot, (as) blind as a bat, (as) bright as a button, (as) bold as brass, as busy as a bee, as clean as a whistle, (as) dead as a/​the dodo, (as) deaf as a post, (as) dull as ditchwater, (as) fit as a fiddle, as flat as a pancake, (as) good as gold, (as) mad as a hatter/​a March hare, (as) miserable/​ugly as sin, as old as the hills, (as) pleased as Punch, as pretty as a picture, (as) regular as clockwork, (as) quick as a flash, (as) safe as houses, (as) sound as a bell, (as) steady as a rock, (as) thick as two short planks, (as) tough as old bootsSee worksheet.
See the Oxford Advanced American Dictionary entry: flash