Used attributively in phrases such as "whiteout conditions"; treated as non-gradable.
Definitions
whiteoutnoun
A weather condition in which visibility and contrast are severely reduced by snow or sand, making it difficult to see the horizon or distinguish between the ground and sky.
The hikers were caught in a whiteout and had to wait for the storm to pass before continuing their journey.
A correction fluid used to cover errors in writing or typing on paper.
She used whiteout to correct the typo on her report before submitting it.
whiteoutverb
To cover a mistake in writing with a white correction fluid.
She had to whiteout the error on the form before submitting it.
To obscure or erase something completely, often used metaphorically.
The heavy snowstorm seemed to whiteout the entire landscape.
whiteoutadjective
Relating to or characteristic of the near-zero-visibility weather conditions known as a whiteout.
All flights were cancelled due to the whiteout conditions.