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

  • n. The land area drained by a river and its tributaries.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An extent of land where water from rain or snow melt drains downhill into a river or series of rivers.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. the entire geographical area drained by a river and its tributaries; an area characterized by all runoff being conveyed to the same outlet


Sorry, no etymologies found.


  • But when the glaciers in the Tibetan Plateau, in the Himalayas melt away, and they are doing it at about four meters per year, and the big rivers that feed off these glaciers become seasonal only with rain, and that affects their crops and their farmers along the river basin, I think they'll have to sit back and ask themselves, do you want this huge upset in your demography?

    CNN Transcript Sep 21, 2008

  • The most fastidious would hardly fail to appreciate an object lesson given this morning of the river basin.

    News From the Clubs.

  • If nothing is done in the river basin, the following is expected:

    Greeley Tribune - Top Stories

  • Specifically, a wet autumn proceeded both years and there was significant snow fall in the river basin.

    Iowa City Press-Citizen - Local News

  • The second option would install a traditional bridge over at least part of the river and allow the tide to flow freely back and forth into the river basin. - News

  • The weather service warns residents to be prepared to protect life and property along the river basin and

    The Orange County Register - News Headlines : News


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