“Black ice” means a very thin, clear layer of ice on a road or sidewalk that is hard to see. It is called “black” because the ice is almost invisible, so the dark road shows through it.
People usually use this term when talking about winter weather and dangerous walking or driving conditions. For example, someone might warn, “Be careful, there’s black ice on the road,” to mean the surface may look normal but is actually slippery.
Meaning & Usage
Black ice is a common winter safety term. It often appears early in the morning, at night, or after a light freeze. Drivers and pedestrians use it to describe a hidden danger that can cause accidents or falls.
Examples
“The bridge was covered in black ice.”
“Slow down—there may be black ice on the sidewalk.”
Is black ice really black?
No. It is usually clear and hard to see, which is why it is so dangerous.
Where does black ice usually form?
It often forms on roads, bridges, sidewalks, and shaded areas where temperatures drop quickly.
Why is black ice dangerous?
Because people may not notice it until they slip or lose control of a vehicle.
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