- a line, as drawn on a map, connecting the lowest points of a valley.
- Chiefly International Law. the middle of the main navigable channel of a waterway that serves as a boundary line between states.
Origin of thalweg
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for thalweg
The thalweg has been frequently confirmed as the accepted boundary where no conventions to the contrary existed.International Law
George Grafton Wilson and George Fox Tucker
- the longitudinal outline of a riverbed from source to mouth
- 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 & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for thalweg
Online Etymology Dictionary, © 2010 Douglas Harper
- The line defining the lowest points along the length of a river bed or valley, whether underwater or not.
- A subterranean stream following a course similar to that of an overlying surficial stream.
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