whiteout

A heavy snowstorm; a blizzard.

Any weather condition in which visibility and contrast are severely reduced by snow or sand causing the horizon and physical features of the terrain to disappear.

A whiteout can best be described as a paradoxical combination of being partially blind, but also being able to see illusions of things. It is like floundering in a sea of cotton; everything looks blurred and white.

Correction fluid (from the brand name Wite-Out).

A sporting event where all in attendance are urged to wear white apparel.

The simulated erasure of a file, etc. on a read-only volume.