thalweg

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

  1. noun the middle of the chief navigable channel of a waterway that forms the boundary line between states
  2. noun a line following the lowest points of a valley

Etymology

Borrowed from 19th century German Thalweg, from Thal (“valley”) + Weg (“way, course”).

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