Pontus Syllabification: (Pon·tus)Pronunciation: /ˈpäntəs/Definition of Pontus an ancient region in northern Asia Minor, on the Black Sea coast north of Cappadocia. By the end of the 1st century bc, it had been defeated by Rome and absorbed into the Roman Empire. Pontus in other Oxford dictionaries Definition of Pontus in the British & World English dictionary