circuit board
Americannoun
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Electronics. a sheet made up of layers of conductive and insulating material used for the mounting and interconnection, often by a printed circuit, of components in electronic equipment.
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Also called card. Computers. a piece of fiberglass or other material upon which chips can be mounted to perform specific functions.
noun
Etymology
Origin of circuit board
First recorded in 1945–50
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The researchers produced the chip using established semiconductor techniques and mounted it on a custom circuit board.
From Science Daily • Apr. 2, 2026
The culprit was found to be an overheated circuit board at a facility in Virginia.
From The Wall Street Journal • Mar. 15, 2026
Li taught himself computer programming and learned how to design a circuit board.
From Barron's • Jan. 29, 2026
Now the retired director of photography is fielding orders for the BlueChirper after teaching himself how to make a circuit board that can emit the annoying sound and flash a blue light.
From Los Angeles Times • May 29, 2025
This is how he isolates the true impact of that single switch on the sprawling circuit board.
From "Freakonomics: A Rogue Economist Explores the Hidden Side of Everything" by Steven D. Levitt
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
