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Simple Definition of whiteout

from our Learner's Dictionary

whiteout

noun

ˈwaɪtˌaʊt

plural whiteouts

: a type of snowstorm in which blowing or falling snow and clouds make it very difficult to see

We got caught in a whiteout.

whiteout conditions

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“Whiteout.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/whiteout. Accessed 22 Jun. 2026.

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