Definitions from Wiktionary (mainframe)

▸ noun:  (computer hardware) A large, powerful computer able to manage very many simultaneous tasks and communicate with very many connected terminals; used by large, complex organizations (such as banks and supermarkets) where continuously sustained operation is vital.
▸ noun:  (computer hardware) A computer chassis that hosts and interconnects modules that perform various tasks.
▸ noun:  The main frame of a vehicle etc., more commonly main frame.
▸ Also see mainframe

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