Grey matter

noun

Definitions

Noun
  1. 1
    Brains; a person's ability to think. idiomatic, uncountable

    ""I'd better be putting my grey matter into that algebra instead of wasting it plotting for a party dress that I certainly can't get.""

  2. 2
    greyish nervous tissue containing cell bodies as well as fibers; forms the cerebral cortex consisting of unmyelinated neurons wordnet
  3. 3
    Literal brains as a general substance. uncountable

    "He fell from the 5th floor. There is grey matter on the path behind his head. I'm afraid he's dead."

  4. 4
    A collection of cell bodies and (usually) dendritic connections, in contrast to white matter. uncountable

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