- The definition of a marsh is a swampy area of lowlands.
A wet and swampy area is an example of a marsh.
Sunset over a marsh.
Origin of marshMiddle English mersch ; from Old English merisc, akin to Middle Low German mersch, marsch (from source German marsch) ; from Indo-European base an unverified form mori, sea from source mare
Origin of marshMiddle English, from Old English mersc; see mori- in Indo-European roots.
- An area of low, wet land, often with tall grass.
From Middle English mersh, mershe, from Old English merisc, mersc, from Proto-Germanic *mariskaz (cf. West Frisian mersk, Dutch meers (“grassland, meadow"), German Marsch), from *mari "˜mere'. More at mere.