dune
nounUK /djuːn/
US /duːn/
A dune is a big hill of sand.
We ran up the dune to see the ocean.
OTHER MEANINGS
2. A ridge of sand piled up by the wind on a beach or in a desert.
The wind slowly shaped the dune over many years.
3. A low rounded hill or mound of loose material.
Grass grew on the small dune beside the road.
4. A sandy area near the coast where dunes form.
The birds nested in the dunes behind the beach.