flood plain

or flood·plain


noun

a nearly flat plain along the course of a stream or river that is naturally subject to flooding.

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Origin of flood plain

First recorded in 1870–75
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for flood plain

British Dictionary definitions for flood plain

flood plain

noun

the flat area bordering a river, composed of sediment deposited during flooding
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