thalweg

noun
thal·​weg | \ ˈtälˌveg, -vāḵ \
plural -s

Definition of thalweg

1a : 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 one crossing all contour lines at right angles
c : subsurface water percolating beneath and in the same direction as a surface stream course
2 : the middle of the chief navigable channel of a waterway which constitutes a boundary line between states

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

History and Etymology for thalweg

German talweg (formerly spelled thalweg), from tal valley (from Old High German) + weg way, path, from Old High German

Learn More About thalweg

Dictionary Entries Near thalweg

thalpotic

thalweg

thamakau

See More Nearby Entries 

Statistics for thalweg

Cite this Entry

“Thalweg.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/thalweg. Accessed 15 Aug. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

WORD OF THE DAY

Test Your Vocabulary

Odd Habits and Quirks

  • image1926873504
  • Which of the following best describes an easily irritated person?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!