1. A ditch round a fortress.

2. To surround with a ditch.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• vomt,
• mthat,
• mosto,
• muant,
• mozat,
• mowth,
• mght,
• noat,
• moet,
• moste,
• mdai,
• msoit,
• fomat,
• komt,
• mmost,
• mmath,
• mont,
• poat,
• mortat,
• moww

• mode,
• moiety,
• moot,
• motto,
• mott,
• moth,
• mouth,
• mood,
• MOTA,
• motta,
• mot,
• mod,
• mote,
• Motte,
• Mothy.

The adjective form of the word "moat" is "moated".

The plural of the "moat" can be the "moats".

The singular of the "moat" can be the "moat".