floodway

[ fluhd-wey ]
/ ˈflʌdˌweɪ /

noun

the channel and adjacent shore areas under water during a flood, especially as determined for a flood of a given height.

Origin of floodway

First recorded in 1885–90; flood + way1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Science definitions for floodway

floodway

[ flŭdwā′ ]

A channel for an overflow of water caused by flooding.

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