柯林斯詞典white out 1. V to lose or lack daylight visibility owing to snow or fog (由于雪霧而)失去白天光線能見(jiàn)度; 缺乏白天光線能見(jiàn)度2. N an atmospheric condition consisting of loss of visibility and sense of distance and direction due to a uniform whiteness of a heavy cloud cover and snow-covered ground, which reflects almost all the light it receives 乳白天空 返回 white-out