# grey matter

idiom

Source: https://englishreference.com/idiom/grey-matter
Updated: 2026-08-10

## Meaning

Brains; a person's ability to think.

## Examples

- Reading books keeps your grey matter active.
- The puzzle was designed to challenge your grey matter and improve your problem-solving skills.
- Years of studying philosophy had sharpened his grey matter, allowing him to dissect arguments with surgical precision.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.