fog

I UK [fɒɡ] / US [fɔɡ] noun *

1) [countable/uncountable] a thick cloud that forms close to the ground or to water and is difficult to see through. Fog is thicker than mist

thick/heavy/dense/freezing fog:

Heavy fog forced drivers to slow down.

a patch of fog:

There may be some patches of fog around dawn.

a blanket of fog (= fog that covers everything):

a thick blanket of fog in the valley

fog lifts (= goes away):

We'll leave when this fog has lifted.

2) [singular] a cloud of smoke or some other gas

fog of:

a fog of cigar smoke

3) [singular] a confused or confusing situation or state

in a fog:

My mind's in a complete fog.

fog of:

She shook off the fog of sleep.

II UK [fɒɡ] / US [fɔɡ] verb
Word forms "fog":
present tense I/you/we/they fog he/she/it fogs present participle fogging past tense fogged past participle fogged

1) fog or fog up

[intransitive/transitive] if a window or mirror fogs, or if you fog it, it becomes covered with steam so that you cannot see through it or in it

2)

a) [transitive] to make someone confused

My brain was fogged by sleep.

b) to make something confusing or difficult to understand

fog the issue:

Your questions are only fogging the issue.