A dune is a small hill made of sand, often found near the sea or in the desert. Wind shapes the sand into these hills. People can see dunes on beaches or dry areas.
Children play on the big sand dune.
The desert has many tall dunes.
Dune is the name of a made-up desert planet in a popular science fiction story. Many books and movies use this name for their story’s setting.
The story takes place on the planet Dune.
Dune is a famous science fiction book.
Sometimes dunes are sediment mounds near water, like rivers or seas. These form naturally when soil or sand collects in one place. They can change the flow of water.
The river has a small dune by the shore.
Boats avoid the dunes in the water.
Sometimes people use 'dune' to mean a big pile of things, like papers or boxes. This is a figurative or informal use, like saying a lot of something is stacked high.
She has a dune of homework to finish.
They built a dune of boxes in the room.
