Sylvaner Syllabification: (Syl·va·ner)Pronunciation: /silˈvänər, -ˈvanər/Definition of Sylvaner noun a variety of wine grape first developed in German-speaking districts, the dominant form being a white grape. a white wine made from the Sylvaner grape. Origin:GermanSylvaner in other Oxford dictionaries Definition of Sylvaner in the British & World English dictionary