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flood plain

a nearly flat plain along the course of a stream or river that is naturally subject to flooding.
Origin of flood plain
1870-75 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for flood plain
  • If a river floods repeatedly, over time this sediment will build up into a flood plain.
  • Each year, the river overflowed, spreading rich sediment across its broad flood plain.
  • If the water spreads out over a flood plain, it is much more shallow than it would be if still contained in the river.
  • Historically, such settlements have clung to the higher ground on the flood plain.
  • Permissible uses within flood plain but outside floodway.
  • Amends various provisions relating to flood plain management.
British Dictionary definitions for flood plain

flood plain

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
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