concussion Meaning, Definition & Usage

noun injury to the brain caused by a blow; usually resulting in loss of consciousness
noun any violent blow

L. concussio, fr. concutere, concussum, to shake violenty; con- + quatere to shake. See Cashier, Quash.

A shaking or agitation; a shock; caused by the collision of two bodies.
It is believed that great ringing of bells, in populous cities, hath dissipated pestilent air; which may be from the concussion of the air. Bacon.
(Med.) 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.
(Civil Law) The unlawful forcing of another by threats of violence to yield up something of value.
Then concussion, rapine, pilleries, Their catalogue of accusations fill. Daniel.
Syn. -- See Shock.