skull
nounUK /skʌl/
US /skʌl/
The hard bone that protects your brain and makes the shape of your head.
The helmet keeps your skull safe when you ride a bike.
OTHER MEANINGS
2. A symbol of a human skull, often used to warn of danger or poison.
The bottle had a skull and crossbones on the label.
3. The bony case of an animal's head.
We found a bird skull in the garden.
4. A person's head or mind, used informally.
Get that idea out of your skull!