What does "floodplain" mean?

A low-lying plain adjacent to a river subject to flooding during periods of high rainfall or at high tide.

What is a synonym for "floodplain"?

Common synonyms include: alluvial plain, bottomland, bottomlands, flood plain, holm, lowland.

Pronounced //ˈflʌdˌpleɪn//.

//ˈflʌdˌpleɪn// noun

noun ·Rare ·Advanced level

Noun

1
A low-lying plain adjacent to a river subject to flooding during periods of high rainfall or at high tide.
"Near-synonyms: bottomland, bottomlands"
2
a low plain adjacent to a river that is formed chiefly of river sediment and is subject to flooding wordnet