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river basin

noun, Physical Geography
the area of land drained by a river and its branches.
Origin of river basin
1875-80 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for river basin
  • The tracks of a little bird are seen in a dried-out river basin, where you could hardly imagine a form of life.
  • They must have changed their route to another river basin.
river basin in Science
river basin  
The land area that is drained by a river and its tributaries. The Mississippi River basin, for example, is a vast area that covers much of the central United States from the central ranges of the Appalachian Mountains in the east to the eastern ranges of the Rocky Mountains in the west, funneling toward its delta in southern Louisiana and emptying into the Gulf of Mexico.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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