D2 Syllabification: (D)Pronunciation: /dē/Translate D | into French | into German | into Italian | into Spanish Definition of D abbreviation Democrat or Democratic. depth (in the sense of the dimension of an object from front to back). Chemistry dextrorotatory:D-glucose (with a numeral) dimension(s) or dimensional:a 3-D model (in tables of sports results) drawn. (on an automatic gearshift) drive. (in personal ads) divorced. symbol Physics electric flux density. Chemistry the hydrogen isotope deuterium. D in other Oxford dictionaries Definition of D in the British & World English dictionary