gray matter

noun
|Updated on: 8 Jun 2018

Definition of gray matter

1 : neural tissue especially of the brain and spinal cord that contains nerve-cell bodies as well as nerve fibers and has a brownish-gray color

Examples of gray matter in a Sentence

  1. she's got the gray matter to figure that equation out

Recent Examples of gray matter from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'gray matter.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of gray matter

1809

in the meaning defined at sense 1

See Words from the same year
NEW! Time Traveler

GRAY MATTER Defined for English Language Learners

gray matter

Definition of gray matter for English Language Learners

  • : the tissue that makes up the brain


Medical Dictionary

gray matter

noun

medical Definition of gray matter

: neural tissue especially of the brain and spinal cord that contains cell bodies as well as nerve fibers, has a brownish gray color, and forms most of the cortex and nuclei of the brain, the columns of the spinal cord, and the bodies of ganglia called also gray substance


Seen and Heard

What made you want to look up gray matter? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

to pay off by making regular payments

Get Word of the Day daily email!

Test Your Vocabulary

Words for Summer: A Quiz

  • a-closeup-of-a-sunflower
  • Which of the following words means “of or relating to summer”?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!