nectarine Syllabification: (nec·tar·ine)Pronunciation: /ˌnektəˈrēn/Translate nectarine | into French | into Italian | into Spanish Definition of nectarine noun a peach of a variety with smooth, thin, brightly colored skin and rich firm flesh. the tree bearing the nectarine. Origin: early 17th century (also used as an adjective meaning 'nectarlike'): from nectar + -ine4nectarine in other Oxford dictionaries Definition of nectarine in the British & World English dictionary