Pronunciation: (hwīt'out", wīt'-),[key] —n. 1. Meteorol. a. a condition, found in polar regions, in which uniform illumination from snow on the ground and from a low cloud layer makes features of the landscape indistinguishable.
b. a condition of heavily falling or blowing snow in which visibility is very poor.
2. an act or instance of whiting out with a correction fluid.
3. a white correction fluid used for this: a bottle of whiteout. 4. a mistake, as in typing, that has been whited out with a correction fluid.