mainframe

noun main·frame \ ˈmān-ˌfrām \
Updated on: 19 Nov 2017

Definition of mainframe

1 : a large, powerful computer that can handle many tasks concurrently and is usually used commercially
  • … the million-dollar mainframe computers that took up entire floors of corporate premises …
  • —John Derbyshire
2 dated : a computer with its cabinet and internal circuits especially when considered separately from any peripherals connected to the computer

Recent Examples of mainframe from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'mainframe.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of mainframe

1957

Other Computer-Related Terms


MAINFRAME Defined for English Language Learners

mainframe

noun

Definition of mainframe for English Language Learners

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



Seen and Heard

What made you want to look up mainframe? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

ditzy

Get Word of the Day daily email!

Test Your Vocabulary

Find the Cousins

  • a-large-tree-with-many-branches
  • Which pair shares a common word ancestor?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!