Gaziantep Syllabification: (Ga·zi·an·tep)Pronunciation: /ˌgäzē-änˈtep/Definition of Gaziantep a city in southern Turkey, near the border with Syria; population 1,175,000 (est. 2007). Former name (until 1921): Aintab.Gaziantep in other Oxford dictionaries Definition of Gaziantep in the British & World English dictionary