From Dutch and German - Infinitive = Smelten (= To smelt). The word is used in both Dutch and German, they are not the same language. Definition; 1). To smelt ore in order to get metal from it, or produce metal in this way. The separation of the metal usually requires a chemical change. 2). To undergo fusing or melting in the process of smelting. 3). Fish of northern waters: a small silvery sea or freshwater fish. 4). Smelt as food: the oily flesh of a smelt as food. 5).