[ meyn-freym ]
See synonyms for mainframe on
  1. a large computer, often the hub of a system serving many users.

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Origin of mainframe

First recorded in 1960–65; main1 + frame

Words Nearby mainframe Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use mainframe in a sentence

British Dictionary definitions for mainframe


/ (ˈmeɪnˌfreɪm) /

    • a high-speed general-purpose computer, usually with a large storage capacity

    • (as modifier): mainframe systems

  1. the central processing unit of a computer

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for mainframe


[ mānfrām′ ]

  1. A large, often powerful computer, usually dedicated to lengthy, complex calculations or set up for use by many people simultaneously. Compare personal computer.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Cultural definitions for mainframe


A large, powerful computer system. A mainframe computer typically carries out complex calculations and is shared by many users. (Compare personal computer.)

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.