Fog is a thick cloud of tiny water droplets that stays close to the ground and makes it hard to see clearly. It often looks like a low, gray mist covering roads, fields, or cities.
People use the word fog in daily life to talk about weather that makes things blurry or hard to see. For example, drivers may slow down in fog, and people may say “my mind is foggy” when they feel tired or confused.
Meaning & Usage
Fog is common in cold or damp weather, especially early in the morning or at night. It can affect travel, so people pay attention to fog warnings when driving, flying, or walking outside.
Examples
“The fog was so thick that we could barely see the road.”
“I was still in a fog after waking up too early.”
Is fog the same as mist?
They are similar, but fog is usually thicker and makes it harder to see than mist.
Why does fog happen?
Fog forms when water vapor in the air cools and turns into tiny droplets near the ground.
Can fog be dangerous?
Yes. Thick fog can make driving, flying, and walking more dangerous because visibility is lower.
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