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

Researchers are concerned that growing demand for rare earths and gold will only continue to increase unregulated mining in the region and are pushing for urgent testing of the rivers and floodplains to understand the extent of the problem and protect communities. —Helen Regan, CNN Money, 26 Nov. 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

Other challenges could include possible environmental cleanup work, floodplain modifications, and underground utility relocations. —Hannah Kirby, jsonline.com, 12 Nov. 2025

Dulini Anabezi offers private plunge pools and viewing decks overlooking the river and floodplains. —Elizabeth Gordon, Travel + Leisure, 8 Nov. 2025

Word History

First Known Use

1873, in the meaning defined at sense 1

Rhymes for floodplain

• abstain
• airplane
• alkane
• arcane
• arraign
• attain
• backplane
• betaine
• biplane
• blockchain
• butane
• campaign

Kids 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