from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A line connecting the waterfalls of nearly parallel rivers that marks a drop in land level.
  • n. The natural line of descent, as for skiing, between two points on a slope.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A geomorphologic unconformity marking a boundary between an upland region and a plane; sometimes marked by a series of waterfalls on rivers that cross it.
  • n. The imaginary line downhill that something falling downhill would naturally follow.


Sorry, no etymologies found.


Sorry, no example sentences found.


Log in or sign up to get involved in the conversation. It's quick and easy.