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flash - definition and synonyms


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verb flash pronunciation in American English /flæʃ/
Word Forms
present tense
present participleflashing
past tenseflashed
past participleflashed
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  1. 2
    [intransitive] to appear for a very short time and then quickly disappear
    flash across/by/on/past:

    The faces of Hollywood’s most glamorous stars flashed across the screen.

    1. a.
      [transitive] to communicate something very quickly and for a short time, for example a message, image, or look
      flash something across/on/to something:

      They flashed weather warnings on the screen.

      Our nerves flash messages to the brain.

      flash someone something:

      Ted flashed me a huge grin and looked away.

    2. b.
      [intransitive] if a thought flashes across your mind, it comes and goes very quickly
      flash across/through/into:

      The thought that I might die flashed through my mind.

  2. 3
    [intransitive] to pass very quickly

    Traffic flashed past us in the other lane.

    The week seemed to flash by.

  3. 4
    [intransitive] mainly literary if someone’s eyes flash, a sudden strong emotion appears in them, especially anger
  4. 5
    [intransitive] if a man flashes, he commits the crime of showing his sex organs in public in order to frighten or upset people


to fall over forwards so that your face hits the ground or another surface

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the activity of exploring abandoned buildings and other manmade structures

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