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Related to white out: Liquid Paper
1. To erase or cover something so that it cannot be seen or read: I whited out the information on my computer screen. Some of the words in the passage were whited out, and the students had to fill them in.
2. To cause something or someone to be rendered incapable of seeing the surrounding area because of falling or blowing snow: The drivers were completely whited out during the blizzard.