Herzegovina Syllabification: (Her·ze·go·vi·na)Pronunciation: /ˌhərtsəˈgōvənə, ˌhert-, -gōˈvēnə/ (also Hercegovina)Definition of Herzegovina a region in the Balkans that forms the southern part of Bosnia and Herzegovina and is separated from the Adriatic Sea by part of Croatia. Its chief town is Mostar. Derivatives HerzegovinianPronunciation: /-gōˈvinēən, -gōˈvēnēən/ adjective & noun Herzegovina in other Oxford dictionaries Definition of Herzegovina in the British & World English dictionary