[ kuhn-kuhsh-uhn ]
See synonyms for concussion on
  1. Pathology. 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.

  1. the act of violently shaking or jarring.

Origin of concussion

First recorded in 1350–1400; Middle English, from Latin concussiōn-, stem of concussiō “a shaking,” also “earthquake, extortion”; equivalent to concuss + -ion

Other words from concussion

  • con·cus·sion·al, con·cus·sant [kuhn-kuhs-uhnt], /kənˈkʌs ənt/, adjective
  • con·cus·sive, adjective

Words Nearby concussion Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use concussion in a sentence

British Dictionary definitions for concussion


/ (kənˈkʌʃən) /

  1. a jarring of the brain, caused by a blow or a fall, usually resulting in loss of consciousness

  2. any violent shaking; jarring

Derived forms of concussion

  • concussive, adjective

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for concussion


[ kən-kŭshən ]

  1. An injury to a soft structure, especially the brain, produced by a violent blow or impact and followed by a temporary, sometimes prolonged, loss of function. A concussion of the brain results in transient loss of consciousness or memory.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.