In the blink of an eye

Meaning

Something happening extremely quickly.

Usage

Used when commenting on sudden changes or fast results.

Origin & History

Origins and dates here are approximate summaries. Many idioms have disputed or unknown origins, and not every date has been checked against a historical dictionary, so treat specific dates and stories as a starting point rather than a citation.

Refers to the very short duration of a single eyelid blink.

Appears in early modern English describing brief moments.