Meaning of “microprocessor” - Learner’s Dictionary

microprocessor

noun [ C ] uk us /ˌmaɪkrəʊˈprəʊsesər/ US  /ˈmaɪkrəʊˌprɑːsesər/

the part of a computer that controls all the other parts

(Definition of “microprocessor” from the Cambridge Learner’s Dictionary © Cambridge University Press)