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| atmospheric conditions having or characterized by zero visibility in both horizontal and vertical directions |
| the variable frontal zone of middle latitudes separating air masses of polar and tropical origin |
| whiteout | |
noun | |
| 1. | 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 |
verb | |
| 1. | cover up with a liquid correction fluid; "white-out the typo" |
| 2. | lose daylight visibility in heavy fog, snow, or rain [syn: white-out] |