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drainage basin

the area drained by a river and all its tributaries.
Also called catchment area, drainage area.
Compare watershed (def 2).
Origin of drainage basin
An Americanism dating back to 1880-85 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for drainage basin

drainage basin

another name for catchment area
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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drainage basin in Science
drainage basin
An area drained by a river system. A drainage basin includes all areas that gather precipitation water and direct it to a particular stream, stream system, lake, or other body of standing water.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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