islen.[Obs.] See Aisle.()n.[OF. isle, F. le, L. insula; cf. Lith. sala. Cf. Insulate.]()1. An island.()Imperial rule of all the seagirt isles. (Milton.)2. (Zol.) A spot within another of a different color, as upon the wings of some insects.()v. t. To cause to become an island, or like an island; to surround or encompass; to island.()Isled in sudden seas of light. (Tennyson.)