noun

dune

DOON/duːn/

A hill or ridge of sand formed by wind.

Wind blows loose sand over the crest of the dune.

An isolated wind-shaped sand dune with a curved crest, a gently sloping rippled windward side, a steep smooth slip face, and a thin plume of sand blowing over the ridge.
Etymology

French dune names a sand hill, preserving the landform image of the English word. French is only one possible immediate source, and the suggested deeper relationship with down meaning “hill” remains uncertain.

In context

DW Documentary16:46
preventing tons of sand, an inland dune, from a destructive migration.
Turning vapor into drinking water - Catching fog in response to drought | DW Documentary

More examples

  • We climb a steep dune to see the ocean.
  • Beach grass helps keep the dunes from blowing away.
  • Desert dunes slowly shift as the wind moves their sand.

Forms

dune · dunes

Similar words

hill
A raised area of land, not necessarily windblown sand.
ridge
A long, narrow elevation, not necessarily made of sand.