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English definition of “flash”

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flash

noun
 
 
/flæʃ/
BRIGHT LIGHT [C] B2 a sudden bright light: The bomb exploded in a flash of yellow light.Light
CAMERA [C, U] B2 a piece of camera equipment that produces a bright light when you take a photograph in a dark placePhotography
SUDDEN EXPERIENCE [C] a sudden experience of something such as a feeling or idea: a flash of anger I had a flash of inspiration.Feelings - general words
in a flash immediately, or very quickly: I'll be back in a flash.ImmediatelyFast and rapidShort in time
(Definition of flash noun from the Cambridge Learners Dictionary © Cambridge University Press)
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