central processing unit, CPU, C.P.U., central processor, processor, mainframe

(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

• electronic equipment — equipment that involves the controlled conduction of electrons (especially in a gas or vacuum or semiconductor)
• hardware, computer hardware — the mechanical, magnetic, electronic, and electrical components making up a computer system

• CPU board, mother board — the main circuit board for a computer

• computer, computing machine, computing device, data processor, electronic computer, information processing system — a machine for performing calculations automatically