fog
A2Pronunciation
UK
- /fˈɒɡ/
US
- /ˈfɑɡ/
- /ˈfɔɡ/
Description
- Thick mist
- Low cloud near the ground
- Hard to see through
Fog is not just something from spooky stories. It is basically a cloud that sits on the ground. Tiny drops of water hang in the air and make it hard to see. You might see it rolling over a field in England, hanging over San Francisco Bay, or appearing quietly at night. It can look beautiful and calm, but it can also be dangerous for drivers and sailors. It is often linked with mystery, uncertainty, and the feeling that the way ahead is hidden.
Sometimes "fog" is used figuratively to describe confusion or mental cloudiness. "I was in a fog after the accident" means someone was disoriented and unable to think clearly.
Fog is a mass of tiny water droplets, or sometimes ice crystals, hanging in the air at or near the Earth's surface. It is basically a cloud close to the ground. It reduces visibility and can create dangerous conditions for travel, from ships using foghorns to drivers slowing down on highways.
There are different types of fog, formed in various ways. Radiation fog forms on clear nights when the ground cools rapidly, chilling the air above it. Advection fog occurs when warm, moist air moves over a cooler surface. Upslope fog develops as air is forced to rise up a slope and cools.
Beyond its weather meaning, "fog" often appears in literature and everyday language to suggest mystery, uncertainty, or confusion. A character might be "lost in the fog" of their own memories, or a situation might be described as being "shrouded in fog," meaning it is unclear or hard to understand.
The word itself comes from Middle English fogge, likely of Scandinavian origin, related to words for "mist" and "dampness." From the eerie landscapes of Gothic novels to the practical concerns of maritime navigation, fog is a phenomenon that has captured our imagination and impacted our lives for centuries. So next time you see it rolling in, remember it's more than just water droplets—it's a reminder of nature's power and the mysteries that lie hidden from view.
Examples
- 1
Road conditions
Thick fog covered the road this morning.
- 2
Driving
We had to drive slowly in the fog.
- 3
Weather forecast
Patches of fog are expected early tomorrow.
- 4
Clearing weather
The fog started to lift after sunrise.
Phrase
the fog started to lift
the fog began to disappear
- 5
Glasses
My glasses fogged up as soon as I stepped inside.
Phrase
fog up
become covered with mist
- 6
Mental state
After the overnight flight, I was in a fog all morning.
Phrase
in a fog
unable to think clearly
- 7
Tiredness
Too little sleep gives me brain fog by the afternoon.
Phrase
brain fog
trouble thinking clearly
Forms and spellings
4 forms open this card.
Main spelling
- fognounverb
Forms
- foggedpast tenseverbnoun
- fogspluralnounverb
- fogging-ing formverbnoun