Moselle /məʊˈzɛl/ noun3 •A left tributary of Rhine, flowing through the departments of Vosges, Meurthe-et-Moselle and Moselle in northeastern France, through Luxembourg, and through the states of Rhineland-Palatinate and Saarland, Germany. •A light white wine, made from Riesling grapes originating in the valley of this river.I drank too much moselle, imagining it a mere diuretic. — 1790 •A department of Grand Est, France. formsMoselles