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moat
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As a noun, moat means a deep, wide defensive ditch, normally filled with water, surrounding a fortified habitation. As a verb, it means surround with a moat.
Meanings of moat
6 meaningsnoun
A deep, wide defensive ditch, normally filled with water, surrounding a fortified habitation.
businessfigurativeAn aspect of a business which makes it more "defensible" from competitors, because of the nature of its products, services or franchise or for some other reason.
A circular lowland between a resurgent dome and the walls of the caldera surrounding it.
meteorologyA clear ring outside the eyewall of a tropical cyclone.
Older and rare meanings (1)
obsoleteA hill or mound.
verb
To surround with a moat.
Meanings from Wiktionary (CC BY-SA 4.0) and Open English WordNet (CC BY 4.0).