microelectronics Syllabification: (mi·cro·e·lec·tron·ics)Pronunciation: /ˌmīkrōiˌlekˈträniks/Definition of microelectronics noun [usually treated as singular] the design, manufacture, and use of microchips and microcircuits. Derivatives microelectronic adjective microelectronics in other Oxford dictionaries Definition of microelectronics in the British & World English dictionary