english
1
general::
Phrase(s): fog something up to make something made of glass become covered with a film of water vapor. • The moisture fogged the windshield up, and we had to stop to clean it off. • The moisture fogged up the glass.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Phrase(s): fog up [for something made of glass] to become partially or completely obscured by a film of water vapor. • The glass fogged up, and we couldn’t see out.
McGrawhill's American Idioms And Phrasal Verbs