In physical geography, a dune is a hill of sand built by either wind or water flow. Dunes occur in different shapes and sizes, formed by interaction with the flow of air or water. Most kinds of dunes are longer on the windward side where the sand is pushed up the dune and have a shorter "slip face" in the lee of the wind. The valley or trough between dunes is called a slack. A "dune field" is an area covered by extensive sand dunes.

Dúné [Dew-nay] is a Danish electronic rock band from Skive, Denmark based in the Danish capital Copenhagen. The band consist of Mattias Kolstrup (Lead vocalist), Piotrek Wasilewski (Bass, Synthesizers, percussion & backing vocals), Ole Bjórn (Synthesizers, Piano, Programming, Vocals & Production) & Danny Jungslund (Guitar), who went on a hiatus from the band by January 1, 2013. Their style is comparable to British and American electronic rock and resembles elements of 1980s pop music and 1970s post-punk blend with a distinct and modern Scandinavian touch. The band is best known for their entertaining and energetic live performances.

Düne (Danish: Dynen, North Frisian: de Halem) is one of two islands in the German North Sea Coast Area that belong to the Archipelago of Heligoland, the other being Heligoland proper.

A dune is a hill of sand.