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A long, sharp ridge of soft, clearly differentiated sediments rising between two troughs made by wind or water erosion and extending parallel to the direction of the wind or water flow.
[Of Uyghur dialectal (Tarim Basin) origin, equivalent to modern standard Uyghur yardin, ablative of yar, ridge, steep bank; akin to, Old Turkic yar.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Physical Geography) a rocky ridge in the desert formed by wind erosion
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