Meaning of FOG in English


I. fog 1 /fɒɡ $ fɑːɡ, fɒːɡ/ BrE AmE noun

[ Date: 1500-1600 ; Origin: Probably from a Scandinavian language ]

1 . [uncountable and countable] cloudy air near the ground which is difficult to see through SYN mist

thick/dense/freezing fog

We got lost in the thick fog.

It will be a cold night, and there may be fog patches.

A blanket of fog covered the fields.

The fog lifted (=disappeared) in the afternoon.

2 . [singular] informal a state in which you feel confused and cannot think clearly:

My mind was in a fog.

fog of

the fog of tiredness

• • •



▪ thick/dense/heavy fog (=great in amount and difficult to see through)

The two lorries collided in heavy fog.

▪ freezing fog

Flights were cancelled due to freezing fog.

▪ swirling fog (=which blows around)

She could not see through the swirling fog.

▪ patchy fog (=in some areas but not in others)

Mist and patchy fog will form tonight.

▪ hill/sea/ground fog

Rain was forecast, along with hill fog.

■ verbs

▪ be covered in fog

The mountains were covered in fog.

▪ be shrouded in fog literary

The streets of London were shrouded in fog.

▪ the fog comes down ( also the fog descends literary ) (=it appears)

Day after day the fog came down.

▪ the fog rolls in (=it arrives from the mountains, the sea etc)

The fog rolled in from the ocean.

▪ the fog lifts (=it disappears)

He sat and waited for the fog to lift.

■ phrases

▪ a blanket of fog (=a large area of fog)

A blanket of fog lay over the town.

▪ a bank of fog ( also a fog bank ) (=a large mass of fog)

As we approached the coast, we ran into a dense bank of fog.

▪ patches of fog (=fog that forms in some places but not in others)

Patches of fog are expected later today.

• • •


▪ cloud noun [uncountable and countable] a white or grey mass in the sky that forms from very small drops of water:

The storm was still a way off but black clouds were gathering.


Thick cloud obscured the top of the hill.

▪ fog noun [uncountable and countable] very thick cloud near the ground which is difficult to see through:

The cars crashed into each other in thick fog.


The fog had lifted (=disappeared) slightly.

▪ mist noun [uncountable and countable] light cloud near the ground that makes it difficult for you to see very far. Mist is usually not as thick as fog . You often get mist near areas of water or mountains:

The morning mist was lifting and the sun was coming up.


A grey mist hung over the water.


The hills were shrouded in mist (=surrounded by mist) .

▪ haze noun [singular, uncountable] smoke, dust, or mist in the air which is difficult to see through:

He saw the horses coming towards him through a haze of dust.


The road shimmered in the heat haze.


A pale blue haze hung over the far-off mountains.

▪ smog noun [uncountable and countable] dirty air that looks like a mixture of smoke and fog, caused by smoke from cars and factories in cities:

The city is covered in smog for much of the year.


A smog warning was issued for parts of Southern Oregon.

▪ thundercloud noun [countable] a large dark cloud that you see before or during a storm:

He watched the thunderclouds roll across the valley.

▪ vapour trail British English , vapor trail American English noun [countable] the white line that is left in the sky by a plane:

High overhead, a jet left its vapour trail across the blue sky.

II. fog 2 BrE AmE verb ( past tense and past participle fogged , present participle fogging )

1 . [intransitive and transitive] ( also fog up ) if something made of glass fogs or becomes fogged, it becomes covered in small drops of water that make it difficult to see through SYN mist up , steamed up :

The windscreen had fogged up.

2 . [transitive] to make something less clear SYN cloud

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.