Schleswig-Holstein Syllabification: (Schles·wig-Hol·stein)Pronunciation: /ˈhōlˌstīn, -ˌSHtīn/Definition of Schleswig-Holstein a state in northwestern Germany that occupies the southern part of the Jutland peninsula; capital, Kiel. It consists of the former duchies of Schleswig and Holstein. Schleswig-Holstein in other Oxford dictionaries Definition of Schleswig-Holstein in the British & World English dictionary