How can we improve our white or grey matter? The brain is not static. Just as a city’s power lines need maintenance, and your computer gets slower over time until you upgrade, there are things you can do to benefit your brain matter—both white and grey.
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gray matter
Intelligence. In medicine, gray matter is tissue in the brain and spinal cord. Come on in—we could use your gray matter as we try to solve this problem.
gray matter
Fig. intelligence; brains; power of thought. Use your gray matter and think what will happen if the committee resigns.Surely they'll come up with an acceptable solution if they use some gray matter.
gray matter
Brains, intellect, as in If you'd only use your gray matter, you'd see the answer in a minute. This expression refers to actual brain tissue that is gray in color. Agatha Christie's fictional detective, Hercule Poirot, constantly alludes to using the little gray cells for solving a crime. [Late 1800s]
ˈgrey matter
(informal) intelligence or mental powers: Mark hasn’t got much grey matter, but he tries hard.
See also: grey, matter
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