- (n.) The unlawful forcing of another by threats of violence to yield up something of value.
- (n.) A shaking or agitation; a shock; caused by the collision of two bodies.
- (n.) A condition of lowered functional activity, without visible structural change, produced in an organ by a shock, as by fall or blow; as, a concussion of the brain.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). concussion. Retrieved September 20, 2026, from http://smartdefine.org/concussion/definitions/1990051 |
| Chicago | Webster's. 2011. "concussion" http://smartdefine.org/concussion/definitions/1990051 (accessed September 20, 2026). |
| Harvard | Webster's 2011, concussion, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/concussion/definitions/1990051>. |
| MLA | Webster's. "concussion" 27 May 2011. Web. 20 September 2026. <http://smartdefine.org/concussion/definitions/1990051> |