The part of the computer (machine) that contains the sequencing and processing facilities for instruction execution, initial program load and other machine operations.

The heart of the computer system, where data is manipulated and calculations are performed. The CPU contains a control unit to interpret and execute the program and an arithmetic-logic unit to perform computations and logical processes. It also routes information, controls input and output, and temporarily stores data.

(computer science) the part of a computer (a microprocessor chip) that does most of the data processing; the CPU and the memory form the central part of a computer to which the peripherals are attached

That part of a conventional digital computer which performs the direct operations upon sequences of sysmbols stored as sets of binary digits (bits). See also Architecture, Compilation/Interpretation, Computation, Hardware, Main Memory/Backup Memory, Parallel Distributed Processing, Sequential Processing, Software.

That part of the computer which does all the calculating.