the ancient Volturnus), a small river of Southern Italy, kingdom of Naples, rises among the Samnite Apennines, 5 miles S. of Altidona; flows S.E. till it is joined by the Calore, and afterwards W.S.W., passing Capua, and falling into the Mediterranean near the village of Castel Volturno, 20 miles S.E. of Gaeta. It is about 100 miles in length, and is a deep, rapid, and turbid stream, subject to frequent overflows. It gives name to a victory gained by the forces of Garibaldi over the troops of the King of Naples on 1st October 1860.