A river of NW. Germany, rises in Westphalia, and after a course of 205 m. discharges into Dollart Bay, an inlet of the North Sea; is navigable, and is joined to the Lippe by means of a canal, and also similarly to Dortmund. 2, A celebrated German watering-place, on the Lahn, near Coblenz; its mineral springs, known to the Romans, vary in warmth from 80° to 135° F.