Home›Browse›G›gray mattergray matterOur editors are putting together more complete content — check back in about 20 minutesgray mattergray matter — nounnoun1. the darker tissue of the brain and spinal cord, consisting mainly of nerve cell 1.nounDefinitionthe darker tissue of the brain and spinal cord, consisting mainly of nerve cell bodiesExampleThe brain's gray matter is crucial for processing information.2. intelligence or intellect2.nounDefinitionintelligence or intellectExampleShe's got the gray matter to solve complex problems.