disˈfen,v. [f. dis- 7 b + fen n.] trans. To deprive of the character of a fen; to make no longer fen-land. 1881E. W. Gosse in Encycl.Brit. XII. 62/1 The high fens, of which the greater part have been ‘disfenned’ or stripped of peat, are found in Groningen, Friesland.