moat

A deep, wide defensive ditch, normally filled with water, surrounding a fortified habitation.

A characteristic of a business that enhances its resilience against competitive pressures, arising from the inherent nature of its products, services, brand, or other structural advantages.figuratively

• No matter how good your company's product is or how quickly the industry is growing, if there is no moat, competitors will invade your castle and burn it down.

A circular lowland between a resurgent dome and the walls of the caldera surrounding it.

A clear ring outside the eyewall of a tropical cyclone.

A hill or mound.obsolete

To surround with a moat.transitive