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1. The line defining the lowest points along the length of a river bed or valley.
2. A subterranean stream.
[German Talweg, Thalweg : Tal, Thal, valley (from Middle High German tal, from Old High German) + Weg, way (from Middle High German wec, weg, from Old High German weg; see wegh- in Indo-European roots).]
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.
1. (Physical Geography) the longitudinal outline of a riverbed from source to mouth
2. (Physical Geography) the line of steepest descent from any point on the land surface
[C19: from German, from Thal valley + Weg way, path]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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|Noun||1.||thalweg - the middle of the chief navigable channel of a waterway that forms the boundary line between states|
|2.||thalweg - a line following the lowest points of a valley|
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