Longman Dictionary of Contemporary English
sand dune
noun
EXAMPLES FROM CORPUS
▪ Parts of the fairway had reverted to sand dune.
▪ The only hazard they are likely to encounter is a sand dune.
Wiktionary
sand dune
n. (context geology English) A large, semi-permanent mound of windblown sand, held together by specialized plants, common along seashores and in deserts.
WordNet
sand dune
n. a ridge of sand created by the wind; found in deserts or near lakes and oceans [syn: dune]
Usage examples of "sand dune".
Impossibly, he saw the dark figure of a man, a silhouette standing high on a sand dune, a tattered cloak blowing about him.
I live just down the shore, Miss Wright, in a place perched on top of a sand dune.
Hal and Ruth found themselves standing alone on a sand dune, moonlight painting the desert a ghostly silver around them.