Thrace Syllabification: (Thrace)Pronunciation: /THrās/Definition of Thrace an ancient country that was west of the Black Sea and north of the Aegean Sea. It is now divided between Turkey, Bulgaria, and Greece. Derivatives ThracianPronunciation: /ˈTHrāSHən/ adjective & noun Thrace in other Oxford dictionaries Definition of Thrace in the British & World English dictionary