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Noun mainframe has 2 senses
  1. mainframe, mainframe computer - a large digital computer serving 100-400 users and occupying a special air-conditioned room
    --1 is a kind of digital computer
    --1 has particulars: supercomputer
  2. 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
    --2 is a kind of electronic equipment; hardware, computer hardware
    --2 is a part of
     computer, computing machine, computing device, data processor, electronic computer, information processing system
    --2 has parts: CPU board, mother board
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