Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun The main printed circuit board in a complex electronic device, such as a personal computer, usually containing the central processing unit, the main system memory, and other components essential to the device's operation.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Electronics) The board containing the main circuits of an electronic device, especially computers. The term is used primarily in microcomputer literature, where it designates the board containing the main expansion bus, and usually also the cpu. On motherboards designed with an expansion bus, often all of the circuits not contained on an expansion card are on the motherboard.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun computer hardware the primary circuit board of a personal computer, containing the circuitry for the central processing unit, keyboard, mouse and monitor, together with slots for other devices

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun the main circuit board for a computer

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

mother +‎ board

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