(geology) Featuring or formed into dunes.
(geomorphology) A ridge or hill of sand piled up by the wind.
A low hill of drifting sand usually formed on the coats, but often carried far inland by the prevailing winds.
‘Three great rivers, the Rhine, the Meuse, and the Scheldt, had deposited their slime for ages among the dunes or sand banks heaved up by the ocean around their mouths.’;
a ridge of sand created by the wind; found in deserts or near lakes and oceans
A dune is a landform composed of wind- or water-driven sand. It typically takes the form of a mound, ridge, or hill.