noun main·frame \ˈmān-ˌfrām\

: a large and very fast computer that can do many jobs at once

Full Definition of MAINFRAME

:  a computer with its cabinet and internal circuits; also :  a large fast computer that can handle multiple tasks concurrently

First Known Use of MAINFRAME

circa 1964

Other Computer-Related Terms

adware, flash, kludge, phishing, recursive, router


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