A microprocessor is a computer processor that incorporates the functions of a central processing unit on a single integrated circuit (IC) of MOSFET construction. The microprocessor is a multipurpose, clock-driven, register-based, digital integrated circuit that accepts binary data as input, processes it according to instructions stored in its memory, and provides results as output. Microprocessors contain both combinational logic and sequential digital logic. Microprocessors operate on numbers and symbols represented in the binary number system.
Read article on Wikipedia