“Black ice” means a thin, nearly invisible layer of ice on a road, sidewalk, or other surface. It is called “black” because you can often see the dark road or ground underneath it, not because the ice itself is black.
People use this term mostly in winter weather. It is dangerous because drivers and walkers may not notice it until they slip or lose control. You may hear weather reports warn about black ice early in the morning or after freezing rain.
Meaning & Usage
Black ice is a common phrase in everyday English, especially when talking about winter safety. It usually refers to ice that is hard to see and easy to miss.
Examples
“Be careful driving this morning — there may be black ice on the bridge.”
“I slipped on black ice outside the store.”
What is black ice?
Black ice is a thin layer of ice that is difficult to see, usually on roads or sidewalks.
Why is black ice dangerous?
It is dangerous because people may not realize it is there until they slip or skid.
When does black ice usually form?
It often forms overnight, early in the morning, or after freezing rain when temperatures drop below freezing.
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