If something is blinding, it's so bright that it makes you lose your vision temporarily. The blinding light of a camera flash can be very annoying.

The bright or dazzling light of fireworks, a flashlight, or even light glinting off of a mirror or a diamond necklace can all be blinding, rendering you briefly unable to see. Anything you can't see through can be described this way, like blinding rain or the blinding white of a blizzard, and even pain is sometimes blinding. The word shares an Old English root with blind, blendan, "to deprive of sight."

Definitions of blinding

adj shining intensely

blinding headlights”
blazing, dazzling, fulgent, glaring, glary
emitting or reflecting light readily or in large amounts

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