Whiteout has 4 different meanings across 2 categories:
Noun · Verb
an arctic atmospheric condition with clouds over snow produce a uniform whiteness and objects are difficult to see; occurs when the light reflected off the snow equals the light coming through the clouds
A heavy snowstorm; a blizzard.
cover up with a liquid correction fluid
"white-out the typo"
lose daylight visibility in heavy fog, snow, or rain