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n. Chiefly British
1. also coom or coombe (ko͞om)
a. A steep, deep valley, especially one running down to the sea.
b. A dry, bowl-shaped valley or hollow on the side of a hill.
2. See cirque.
[Middle English coumb, hollow, valley, from Old English cumb, of Celtic origin; akin to Welsh cwm, valley.]
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) variant spellings of coomb
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a valley enclosed on all but one side.
[before 1000; Old English cumb valley < British Celtic; compare cwm]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.