Meaning of the word "fog up" in English

What does "fog up" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

fog up

US /fɑːɡ ʌp/

UK /fɑːɡ ʌp/

to cover with a film of condensed water vapor, as from breath or steam, making it difficult to see through

Example:

•

The bathroom mirror always fogs up after a hot shower.

•

My glasses fogged up when I came inside from the cold.

Synonym:

mist up steam up cloud over haze over blur

to become confused or unclear in thought or understanding

Example:

•

My mind tends to fog up when I'm tired.

•

The complex instructions made my brain fog up.

Synonym:

confuse obscure muddle bewilder perplex

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