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mainframe

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Etymology and origin of the English word mainframe

Confidence
Established
Formation
Compound
First attested
1704 J. Howell More words from the 18th century
Ultimate origin
Old English mægen,framian
Etymology tree
inherited borrowed derived
English main
English mainframe
From the same root
English mainline ← main
English mainstay ← main
English mainstream ← main

Pronunciation

  • US: /ˈmeɪnˌfɹeɪm/[1]

Etymology

It is formed from English main + frame,[2][3][4][5][6] with main as an adjective.[2][3]

Earliest recorded meaning

The basic framework or body of a structure or device: 1704, in a work by J. Howell.[2]

Semantic evolution

The computing sense, first the central processing unit and primary memory of a computer, is recorded from 1957, in a coding manual for the MIT–IBM 704 computer.[2] Etymonline dates it to 1964,[3] Merriam-Webster Unabridged to about 1964,[4] and Dictionary.com to 1960–65.[5] Merriam-Webster Unabridged defines the first computing sense as a computer with its cabinet and internal circuits.[4] The word now usually means any large, general-purpose computer, especially one supporting many users or terminals at once,[2][7][4] and Dictionary.com compares it with minicomputer and microcomputer.[5]

Timeline

  • 1704 – the basic framework or body of a structure.[2]
  • 1957 – the central processing unit and main memory of a computer.[2] Etymonline dates it to 1964.[3]

Meanings

Noun

  1. A large, powerful computer that can handle many tasks at once, often serving many connected terminals.[4][7][2]
  2. The central processing unit of a computer, without its peripheral devices; originally, its processor and main memory.[7][2]
  3. A framework into which electronic or instrument modules can be fitted.[4]
  4. The basic framework or body of a structure or device.[2]

Usage notes

In the old sense of a structure's framework the OED also records stress on both elements, as in a phrase.[2]

References

  1. ^ Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
  3. ^ a b c d Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  4. ^ a b c d e f Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
  5. ^ a b c Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
  6. ^ Gove, Philip Babcock, ed. (1961), Webster's Third New International Dictionary of the English Language, Unabridged, Springfield, Mass.: G. & C. Merriam
  7. ^ a b c The American Heritage Dictionary of the English Language (1992), 3rd ed., Boston: Houghton Mifflin
Cite this entry

“Mainframe.” Etymologically, 8 Nov. 2026, etymologically.com/en/mainframe. Accessed 9 Nov. 2026.

Last edited on . ·