Air-cushion meaning

Trapped air that supports an object a short distance above a surface.
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An inflatable cushion.
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A cushion inflated with air.
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(mech.) A device for lessening shock by means of the elasticity of compressed air.
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A layer of trapped air that supports a hovercraft.
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A shock absorber that uses an air chamber.
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A rubber or plastic inflatable cushion.
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