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- Dictionarydune/djuːn/
noun
- 1. a mound or ridge of sand or other loose sediment formed by the wind, especially on the sea coast or in a desert: "a sand dune"
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noun
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A dune is a landform composed of wind- or water-driven sand. It typically takes the form of a mound, ridge, or hill. An area with dunes is called a dune system or a dune complex. A large dune complex is called a dune field, while broad, flat regions covered with wind-swept sand or dunes, with little or no vegetation, are called ergs or sand seas. Wikipedia