floodplain
noun
flood·plain
ˈfləd-ˌplān 
1
: level land that may be submerged by floodwaters
2
: a plain built up by stream deposition
Examples of floodplain in a Sentence
Recent Examples on the Web
Many are in Skagit County, where the entire 100-year floodplain has been ordered to evacuate.
—
Alexandra Banner, CNN Money, 12 Dec. 2025
Level 3 evacuation orders—meaning leave immediately and seek higher ground—are in place for some areas, including anyone living within the 100-year floodplain of Skagit County and parts of Orting in Pierce County.
—Hannah Parry, MSNBC Newsweek, 11 Dec. 2025
While that projection is lower than previous estimates, Mount Vernon officials were nonetheless urging residents in the floodplain to evacuate.
—CBS News, 11 Dec. 2025
Mountainous slopes, unstable lava floodplains, and a corrosive atmosphere combine to make this region an exceptionally hazardous destination.
—Kaif Shaikh, Interesting Engineering, 13 Nov. 2025
See All Example Sentences for floodplain
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Alexandra Banner, CNN Money, 12 Dec. 2025
Level 3 evacuation orders—meaning leave immediately and seek higher ground—are in place for some areas, including anyone living within the 100-year floodplain of Skagit County and parts of Orting in Pierce County.
—Hannah Parry, MSNBC Newsweek, 11 Dec. 2025
While that projection is lower than previous estimates, Mount Vernon officials were nonetheless urging residents in the floodplain to evacuate.
—CBS News, 11 Dec. 2025
Mountainous slopes, unstable lava floodplains, and a corrosive atmosphere combine to make this region an exceptionally hazardous destination.
—Kaif Shaikh, Interesting Engineering, 13 Nov. 2025
See All Example Sentences for floodplain
Cite this Entry
“Floodplain.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/floodplain. Accessed 15 Dec. 2025.
Copy CitationKids Definition
floodplain
noun
flood·plain
-ˌplān
1
: low flat land along a stream or river that may flood
2
: a plain built up from earth left by floodwaters
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