Pronunciation: (kun-kush'un), [key]
1. Pathol.injury to the brain or spinal cord due to jarring from a blow, fall, or the like.
2. shock caused by the impact of a collision, blow, etc.
3. the act of violently shaking or jarring.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.