say it: MAYN-fraym
mainframe is a noun meaning "a large digital computer serving 100-400 users and occupying a special air-conditioned room". It carries 2 recorded senses.
a large digital computer serving 100-400 users and occupying a special air-conditioned room
(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 science
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for mainframe come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.