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.
One of the areas of grey matter with the most pronounced and persistent changes was the so-called default mode network - which is involved in self-perception, empathy and altruism.
From BBC ● Mar. 4, 2026
Researchers found reduced grey matter volume in several important brain regions among women who had gone through menopause.
From Science Daily ● Feb. 7, 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
The loss of grey matter in areas involved with memory and emotion might partly explain why women are generally at greater risk of dementia than men, researchers speculate.
From BBC ● Jan. 26, 2026
The cavity of this ventricle is of small size in the living head, for the inner surfaces of the two thalami are connected together by intermediate grey matter, named the middle or soft commissure.
From Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 4 "Bradford, William" to "Brequigny, Louis" by Various
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.
