Meaning of the word "grey matter" in English

What does "grey matter" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

grey matter

US /ˌɡreɪ ˈmæt.ər/
UK /ˌɡreɪ ˈmæt.ər/
"grey matter" picture

Noun

1.

the darker tissue of the brain and spinal cord, consisting mainly of nerve cell bodies and branching dendrites.

Example:
The neurologist examined the patient's grey matter for abnormalities.
Damage to the grey matter can impair cognitive functions.
2.

intelligence; brains.

Example:
You'll need to use your grey matter to solve this puzzle.
It takes a lot of grey matter to become a successful scientist.
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