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fen

/fɛn/ · fen
noun
  1. A type of wetland fed by ground water and runoff, containing peat below the waterline, characteristically alkaline. The fen in the countryside was home to a variety of rare bird species.
noun
  1. A type of peatland ecosystem, often found in low-lying areas. The researchers studied the unique characteristics of the fen ecosystem.
Did you know? Fens are often associated with the Norfolk Broads in England, a network of rivers and wetlands that have been designated a UNESCO World Heritage Site.
Written by Lexi Wordsworth, Dictionary Editor 0 lookups Added Aug 15, 2026