moat

US /moʊt/
UK /moʊt/
"moat" picture
1.

a deep, wide ditch surrounding a castle, fort, or town, typically filled with water and intended as a defense against attack

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The ancient castle was protected by a wide moat.
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They had to cross the moat to enter the fortress.
:
ditchtrenchchannelcanal
1.

to surround (a place) with a moat

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The engineers planned to moat the entire perimeter of the new defense facility.
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The villagers decided to moat their settlement to deter invaders.
:
surroundencirclegirdlering
:
moated