flood·​plain ˈfləd-ˌplān How to pronounce floodplain (audio)
: level land that may be submerged by floodwaters
: a plain built up by stream deposition

Examples of floodplain in a Sentence

Recent Examples on the Web The contrasting landscapes here, including coral coastlines, vast floodplains, rocky escarpments, and the ochre sands of the outback, are astounding. Drew Kluska, Travel + Leisure, 25 Nov. 2023 The site sits on Dorchester Bay, amid five major floodplains, and resiliency measures were critical to protect both the project and the Dorchester and South Boston neighborhoods, the development team said. Catherine Carlock, BostonGlobe.com, 14 Sep. 2023 Impact study requirements Documents obtained from the border commission by The News through an open records request show that DPS and other Texas entities were put on notice about federal permit and floodplain impact study requirements at least as far back as Dec. 21, and many times since then. Gromer Jeffers Jr., Dallas News, 18 Aug. 2023 And even before the high water began taking its toll, the Upper Mississippi River floodplain had lost nearly half of its historical forest due to urban and agricultural land use and changes to the way the water flowed after locks and dams were installed in the 1930s. Taylor Wilson, USA TODAY, 5 Aug. 2023 The hydrophones used in the dolphin study also allowed the team to track how the dolphins are distributed along the mosaic of the floodplains. Elizabeth Gamillo, Discover Magazine, 4 Aug. 2023 That means ramping up efforts to protect from flooding in the winter, but also being prepared to cut back during dry spells, Gleick said: Second: rethinking our approach to building in floodplains — and retreating from some entirely. Ryan Fonseca, Los Angeles Times, 3 Oct. 2023 Only 6 of those acres can be developed because the other 3 are in a floodplain, according to the information. Al Gaspeny, Arkansas Online, 6 Sep. 2023 The Portland City Council is weighing a proposal to tighten requirements for development in floodplains. Gwozniac, oregonlive, 1 Sep. 2023 See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'floodplain.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1873, in the meaning defined at sense 1

Time Traveler
The first known use of floodplain was in 1873

Dictionary Entries Near floodplain

Cite this Entry

“Floodplain.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/floodplain. Accessed 9 Dec. 2023.

Kids Definition


flood·​plain -ˌplān How to pronounce floodplain (audio)
: low flat land along a stream or river that may flood
: a plain built up from earth left by floodwaters

More from Merriam-Webster on floodplain

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