# concussion

Pronunciation: say "kuhn-KUSH-uhn" /kənˈkʌʃən/

## Noun

1. An injury to the body (most often the brain) caused by a violent blow and followed by a loss of normal function. *(US)*
   - Simple: A brain injury from a hard blow to the head that briefly stops the brain from working right.
   - _The boxer left the ring with a concussion and could not remember the final round._
   - _Emergency staff monitored the cyclist for signs of concussion after the collision._

## Noun

2. A violent collision between bodies, or the forceful shock produced by an impact. *(obsolete)*
   - Simple: A hard, violent crash or shaking between two things.
   - _The concussion of the two ships' hulls echoed across the harbor._
   - _Miners reported a deep concussion in the earth moments before the tunnel collapsed._
3. The unlawful use of threats of violence to compel another person to hand over something of value. *(obsolete)*
   - Simple: The crime of using threats of violence to force someone to give up money or goods.
   - _The magistrate found the bailiff guilty of concussion for extorting coin from the villagers under threat of arrest._
   - _Charges of concussion were laid against the steward who forced tenants to surrender their harvest._

## Origin

From Latin concussiō, equivalent to 'concuss' combined with the suffix '-ion'.

Source: DictionaryAI, https://dictionaryai.com/define/concussion (written from Wiktionary data, CC BY-SA 4.0: https://creativecommons.org/licenses/by-sa/4.0/).