Meuse River n 1: a European river; flows into the North Sea [syn: {Meuse}] 2: an American operation in World War I (1918); American troops under Pershing drove back the German armies which were saved only by the Armistice on November 11 [syn: {Meuse}, {Argonne}, {Argonne Forest}, {Meuse-Argonne}, {Meuse-Argonne operation}]