'Dune' definitions:

Definition of 'dune'

(from WordNet)
noun
A ridge of sand created by the wind; found in deserts or near lakes and oceans [syn: dune, sand dune]

Definition of 'Dune'

From: GCIDE
  • Dune \Dune\ (d[=u]n), n. [The same word as down: cf. D. duin. See Down a bank of sand.] A low hill of drifting sand usually formed on the coats, but often carried far inland by the prevailing winds. [Written also dun.] [1913 Webster]
  • Three great rivers, the Rhine, the Meuse, and the Scheldt, had deposited their slime for ages among the dunes or sand banks heaved up by the ocean around their mouths. --Motley. [1913 Webster]