noun

A cannonball is a round, heavy ball made of iron or another metal. It's used as ammunition for a cannon, which is a big, powerful gun. When the cannon is fired, the cannonball shoots out really fast and can travel a long distance.

Example

1. The pirate ship fired a cannonball at our boat!
2. I love jumping off the diving board and doing a cannonball into the pool.
3. The old castle walls were destroyed by the impact of the massive cannonball.