HerzegovinaPronunciation: /ˌhɛːtsəˈgɒvɪnə, -gəˈviːnə/ (also Hercegovina)Definition of Herzegovina a region in the Balkans forming the southern part of Bosnia and Herzegovina and separated from the Adriatic by part of Croatia. Its chief town is Mostar. Derivatives HerzegovinianPronunciation: /-gəˈvɪnɪən/ adjective & noun Herzegovina in other Oxford dictionaries Definition of Herzegovina in the US English dictionary