In a flash
Meaning
To happen or be done extremely quickly or instantaneously.
Origin
The phrase 'in a flash' draws its power from the most elemental experience of speed: the sudden, fleeting burst of light. Imagine a lightning bolt tearing across the sky, or the brief, brilliant flare of a spark. These moments are gone almost before they register, leaving an indelible impression of instantaneousness. It was this sensory understanding of light—its immediate appearance and rapid disappearance—that speakers in the late 18th century harnessed. They took this vivid image and transformed it into a common idiom, making 'in a flash' a punchy, universal way to describe any action performed with breathtaking, almost magical, quickness, as if appearing and vanishing in a single, brilliant moment.
Examples
- The magician made the rabbit disappear from the hat in a flash, astounding the audience.
- Before I could even blink, the car sped past us in a flash, leaving only a blur.