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[doon, dyoon] /dun, dyun/
a sand hill or sand ridge formed by the wind, usually in desert regions or near lakes and oceans.
Origin of dune
1780-90; < French, Old French < Middle Dutch dūna; cognate with down3 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for dune


a mound or ridge of drifted sand, occurring on the sea coast and in deserts
Word Origin
C18: via Old French from Middle Dutch dūne; see down³
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for dune

1790, from French, Middle Dutch or Middle Low German dune, all perhaps from Gaulish *dunom (thus related to down (n.2)). The French dune "sand hill" (13c.) is held by Diez to be an Old French borrowing from Dutch duin or some other Germanic source. Italian and Spanish duna are from French. Dune buggy attested by 1965.

Online Etymology Dictionary, © 2010 Douglas Harper
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dune in Science

A hill or ridge of wind-blown sand. Dunes are capable of moving by the motion of their individual grains but usually keep the same shape. See more at barchan dune, draa, longitudinal dune, seif dune, transverse dune.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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