Definitions

1. noun

A deep, wide ditch surrounding a castle, fort, or other fortified building, typically filled with water.

“The medieval castle was protected by a moat that was difficult to cross.”

2. noun

A deep, wide ditch or water-filled depression, typically in a landscape or surrounding an area.

“The moat of fog surrounded the valley, making it difficult to see.”

3. verb

To surround or enclose something with a ditch or water-filled depression.

“The gardener moated the area to keep the deer away from the plants.”