Definitions
1.AdjectiveCharacteristic of or resembling a fen (“characteristically alkaline wetland containing peat below the waterline”); marshy, swampy; also, of land: containing a fen or fens.
2.AdjectiveNow chiefly of plants: growing or living in a fen.
3.AdjectiveMuddy; hence, dirty, filthy.
4.NounAlternative form of fennie (“fenestration”).