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flash - definition and synonyms


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verb flash pronunciation in British English /flæʃ/
Word Forms
present tense
present participleflashing
past tenseflashed
past participleflashed
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  1. 1
    [intransitive] to shine brightly for a very short time, or to shine on and off very quickly
    Thunder roared and lightning flashed.
    His watch flashed in the sunlight.
    flashing neon signs
    1. a.
      [transitive] to switch a bright light on, or on and off, especially as a signal
      A truck drove close behind me and flashed its headlights.
  2. 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 political slogans 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.
  3. 3
    [intransitive] to pass very quickly
    Traffic flashed past us in the other lane.
    The week seemed to flash by.


a course of study which is much shorter than a university course and focuses on the skills you need for a job, especially computer-related skills

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an ancient Roman system of underfloor heating, used to heat houses with hot air; from the Latin 'hypocaustum'

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