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
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This data can be used to inform government investments in risk reduction, such as ecological forest management and floodplain management, which will likely make insurance markets much healthier over time.
—
Jordan Haedtler, Mercury News, 24 May 2025
The study found that if a major Cascadia earthquake struck today, floodplains could grow by as much as 300 square kilometers (about 116 square miles), more than doubling the number of homes, roads, and structures exposed to flooding.
—Thomas Westerholm, MSNBC Newsweek, 12 May 2025
The nearly 11-acre easement was designated in 2020 and includes wetlands, river banks and floodplains.
—Lauren Penington, Denver Post, 12 May 2025
The team found that if an earthquake that caused more than six feet of subsidence were to happen today, the 100-year floodplain in estuaries in Cascadia would expand by 115 square miles.
—Stephanie Pappas, Scientific American, 30 Apr. 2025
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Jordan Haedtler, Mercury News, 24 May 2025
The study found that if a major Cascadia earthquake struck today, floodplains could grow by as much as 300 square kilometers (about 116 square miles), more than doubling the number of homes, roads, and structures exposed to flooding.
—Thomas Westerholm, MSNBC Newsweek, 12 May 2025
The nearly 11-acre easement was designated in 2020 and includes wetlands, river banks and floodplains.
—Lauren Penington, Denver Post, 12 May 2025
The team found that if an earthquake that caused more than six feet of subsidence were to happen today, the 100-year floodplain in estuaries in Cascadia would expand by 115 square miles.
—Stephanie Pappas, Scientific American, 30 Apr. 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 9 Jul. 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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