Adige (Germ. Etsch, anc. Athesis), a river of Italy formed by the confluence near Glarus of many streams from the Rhaetian Alps; flows E. to Botzen, whence it is navigable, passes into Lombardy, near Roveredo, and turning first S., then E., falls into the Adriatic at Porto-Fossone, near the mouth of the Po, after a course of 220 miles. It is rapid, shallow, and very liable to floods. Trent, Legnago, and Verona are on its banks.