Search Dictionary
Definition of floodplain

floodplain

/ˈflʌdˌpleɪn/
flood · plain
Plural:floodplains
JUMP TO:

floodplain Lexical Profile

floodplain Game Scores & Validity

• noun

1

An area of low-lying, relatively flat land adjacent to a river or stream that is formed mainly of river sediment and is subject to periodic flooding during periods of high discharge.

Example

"The fertile soils of the river's floodplain have supported agricultural communities for thousands of years, despite the seasonal risk of inundation."

Synonyms
View all synonyms for floodplain
Antonyms
View all antonyms for floodplain

• Nearby Words

floodlight
floodlighting
floodmark
floodplain
floodtide
floodwall
floodwater

Word Origin & Etymology

Formed in the mid-19th century as a compound of 'flood' (from Old English 'flod', meaning a flowing of water or deluge) and 'plain' (from Latin 'planum', meaning flat or level ground).

Cite this Entry

Wordmom. (2026). Definition of Floodplain. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/floodplain
Built for writers, students, and competitive word game players, Wordmom combines an uncluttered English dictionary and thesaurus with fast, pattern-based word finders so you can verify definitions, synonyms, and high-scoring tile plays in one place.
Word Games & Solvers
Word FinderScrabble Word FinderWords With Friends CheatWordle SolverAnagram Solver
Dictionary & Reference
DictionarySynonymsAntonymsWords
Community
Contact UsEditorial PolicyPrivacy PolicyTerms and Conditions
© 2016–2026 Wordmom Network. All rights reserved. Made with for word lovers everywhere.
Disclaimer: SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A. and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro. Words With Friends® is a registered trademark of Zynga Inc. Wordle® is a registered trademark of The New York Times Company. Other referenced game titles and tournament lexicon codes (including NASPA NWL and WESPA/HarperCollins CSW) are trademarks of their respective owners. Wordmom is an independent reference utility for educational and entertainment purposes and is not affiliated with, sponsored by, or endorsed by Hasbro, Mattel, Spear, Zynga, The New York Times Company, NASPA, WESPA, or HarperCollins Publishers. All game names are referenced strictly under nominative fair use to indicate compatibility.