grey matter
Britishnoun
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Technical name: substantia grisea. the greyish tissue of the brain and spinal cord, containing nerve cell bodies, dendrites, and bare (unmyelinated) axons Compare white matter
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informal brains or intellect
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.
Deep within the grey matter is plumbing called the glymphatic system.
From BBC ● Jul. 19, 2026
While the pregnant women lost an of average nearly 5% of their grey matter, it then partially returned - although not fully - by six months after giving birth.
From BBC ● Mar. 4, 2026
These shifts in grey matter volume were identified as a key part of healthy brain development.
From Science Daily ● Feb. 19, 2026
Brain imaging revealed that women who were post-menopause showed significant reductions in grey matter volume, regardless of whether they had used HRT.
From Science Daily ● Feb. 7, 2026
And I’ve got the best grey matter in this camp, and I’m going to be top dog as a matter of course.”
From The Snow-Burner by Oyen, Henry
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.
