Found 2 items, similar to thalweg.
English → English (WordNet) Definition: thalweg thalweg n 1: the middle of the chief navigable channel of a waterway that forms the boundary line between states 2: a line following the lowest points of a valley
English → English (gcide) Definition: Thalweg Thalweg \Thal"weg`\, n. [G., fr. thal valley + weg way. See Dale; Way.] (Physiography) (a) A line following the lowest part of a valley, whether under water or not. (b) The line of continuous maximum descent from any point on a land surface, or that cutting all contours and angles. [Webster 1913 Suppl.]