noun

"Castle" is a very large and strong building that was built a long time ago. Castles have tall walls, towers, and sometime it's surrounded by water. In the past, kings, queens, and knights used to live in castles. They were built to protect the people inside from enemies. You might have seen one in a fairy tale, with big gates and often located on top of hills.

Example

1. During our vacation, we visited an old castle with high walls and towers.
2. The history book had a story about a knight who lived in a castle.
3. She drew a picture of a castle with a bridge and trees around it.