| Noun | 1. | mainframe - a large digital computer serving 100-400 users and occupying a special air-conditioned roomdigital computer - a computer that represents information by numerical (binary) digits supercomputer - a mainframe computer that is one of the most powerful available at a given time |
| 2. | 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"computer, computing device, computing machine, data processor, electronic computer, information processing system - a machine for performing calculations automatically CPU board, mother board - the main circuit board for a computer electronic equipment - equipment that involves the controlled conduction of electrons (especially in a gas or vacuum or semiconductor) computer hardware, hardware - (computer science) the mechanical, magnetic, electronic, and electrical components making up a computer system computer science, computing - the branch of engineering science that studies (with the aid of computers) computable processes and structures |