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English definition of “fog up”

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fog up

verb [T] uk phrasal verb with fog   /fɒɡ/ us    /fɑːɡ/ (-gg-)
If a glass surface fogs up, a thin layer of liquid develops on it so that it is difficult to see through: I couldn't see a thing because my glasses had fogged up.
Translations of “fog up”
in Chinese (Traditional) 布滿霧氣,蒙上霧…
in Chinese (Simplified) 布满雾气,蒙上雾…
(Definition of fog up from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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