A hovercraft (air-cushion vehicle, ACV) is a craft

Craft (vehicle)

The word craft since the 17th century has denoted a vehicle or vessel that is used for transportation on the sea, in the air or in space. But it can be applied to fictional vessels such as time craft, dimensional craft, and probability craft...

 capable of traveling over surfaces while supported by a cushion of slow moving, high-pressure air which is ejected against the surface below and contained within a "skirt." Although supported by air, a hovercraft is not considered an aircraft

Aircraft

An aircraft is a vehicle that is able to fly by gaining support from the air, or, in general, the atmosphere of a planet. An aircraft counters the force of gravity by using either static lift or by using the dynamic lift of an airfoil, or in a few cases the downward thrust from jet engines.Although...

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Hovercraft are used throughout the world as specialized transports. They can also be used after a natural disaster for emergency purposes.