Definition of "gray matter" []

• Brownish-gray nerve tissue, especially of the brain and spinal cord, composed of nerve cell bodies and their dendrites and some supportive tissue. (noun)
• Informal Brains; intellect. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "“Well, what we need to do is apply some fresh gray matter to this sitchiation,” he joked, “and come up with something bigger and better that really leaves that show-stealin’ punk in the dust and pullin’ our high ratings out of his ass!”"
• "Their fellows in whom the white and gray matter of the brain cells are a little differently correlated, will in their merry moods sing psalms and make it their habitual activity to reach out after the Unknown in various ways, trying to satisfy the vague and restless longings of what they call their souls by punishing themselves and pampering the poor."