Waal (väl) [key], main arm of the Rhine River, 52 mi (84 km) long, branching off the Rhine near the German border and flowing W through central Netherlands, past Nijmegen to join the Maas (Meuse) near Gorinchem. The joined rivers form the upper Merwede.
The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.
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