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noun con·cus·sion \kən-ˈkə-shən\

: an injury to the brain that is caused by something hitting the head very hard ( US ) ( Brit )

Full Definition of CONCUSSION

a :  a stunning, damaging, or shattering effect from a hard blow; especially :  a jarring injury of the brain resulting in disturbance of cerebral function
b :  a hard blow or collision
con·cus·sive \-ˈkə-siv\ adjective

Examples of CONCUSSION

  1. She suffered a severe concussion after falling on the ice.
  2. He went to hospital with concussion.


Middle English concussioun, from Latin concussion-, concussio, from concutere to shake violently, from com- + quatere to shake
First Known Use: 14th century

Synonym Discussion of CONCUSSION

impact, collision, shock, concussion mean a forceful, even violent contact between two or more things. impact may be used to imply contact between two things, at least one of which is impelled toward the other <the glass shattered on impact with the floor>. collision implies the coming together of two or more things with such force that both or all are damaged or their progress is severely impeded <the collision damaged the vehicle>. shock often denotes the effect produced by a collision and carries the suggestion of something that strikes or hits with force <the shock of falling rocks>. concussion when not in technical use, often suggests the shattering, disrupting, or weakening effects of a collision, explosion, or blow <bystanders felt the concussion of the blast>.

Rhymes with CONCUSSION

CONCUSSION Defined for Kids


noun con·cus·sion \kən-ˈkə-shən\

Definition of CONCUSSION for Kids

:  injury to the brain caused by a hard hit on the head
Medical Dictionary


noun con·cus·sion \kən-ˈkəsh-ən\

Medical Definition of CONCUSSION

:  a hard blow or collision
:  a condition resulting from the stunning, damaging, or shattering effects of a hard blow; especially :  a jarring injury of the brain resulting in disturbance of cerebral function and sometimes marked by permanent damage
con·cus·sive \-ˈkəs-iv\ adjective


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