diabetic Syllabification: (di·a·be·tic)Pronunciation: /ˌdīəˈbetik/Translate diabetic | into French | into German | into Italian | into Spanish Definition of diabetic adjective having diabetes. relating to or designed to relieve diabetes:a diabetic clinic a diabetic diet noun a person suffering from diabetes. diabetic in other Oxford dictionaries Definition of diabetic in the British & World English dictionary