concussion — English Dictionary

Noun

1. A violent collision or shock.

   Usage

   • Countable
   • Obsolete
   • Uncountable

   Examples

   It is believed that great ringing of bells, in populous cities, hath dissipated pestilent air; which may be from the concussion of the air.

   More examples (1)

   [Water vapour bubbles] hit againſt the ſides of the more eminent and Mountainous Places, of the Globe, and by this Concuſſion are condenſed, and thus become heavier than the Air they ſvvom in, and ſo gleet dovvn the rocky Caverns of theſe Mountains, […]

2. An injury to part of the body, most especially the brain, caused by a violent blow, followed by loss of function.

   Usage

   • US usage
   • Countable
   • Uncountable
   • in Canada
   • in Commonwealth

3. The unlawful forcing of another by threats of violence to yield up something of value.

   Usage

   • Countable
   • Obsolete
   • Uncountable

   Examples

   Then Concussion, Rapine, Pillories, / Their Catalogue of Accusations fill.

Noun

1. injury to the brain caused by a blow; usually resulting in loss of consciousness

   Broader terms

   injuryaccidental injury

2. any violent blow

   Broader terms

   blowbump