water system river

water system

noun
1.
a river and all its branches.
2.
a system of supplying water, as throughout a metropolitan area.

Origin:
1825–35

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
water system
 
n
1.  a river and all its tributaries
2.  a system for supplying water to a community

Collins English Dictionary - Complete & Unabridged 10th Edition
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