English Dictionary

Define dictionary terms easily in our powerful online English dictionary.

Searching for...

No matching words found

Try a different search term or browse the dictionary

Definition grey matter in British English

grey matter noun

[uncountable] noun
1

your brain

Synonyms and related words
2

the grey-brown substance in your brain and spinal cord that consists mainly of the bodies of neurons (=cells that carry messages to and from your brain)

Synonyms and related words
Definition grey matter in British English