microprocessor Syllabification: (mi·cro·proc·es·sor)Pronunciation: /ˌmīkrəˈpräsesər, -ˈprōˌsesər/Translate microprocessor | into German | into Italian | into Spanish Definition of microprocessor noun an integrated circuit that contains all the functions of a central processing unit of a computer. Derivatives microprocessing noun microprocessor in other Oxford dictionaries Definition of microprocessor in the British & World English dictionary