concussion

Pronunciation

• IPA ^(key): /kənˈkʌʃən/ or /kənˈkʌʃn/

• Audio (US)

  (file)

Noun

Singular concussion

Plural concussions

1. A concussion is the result of a really hard hit to the head. It is caused by the brain being shaken around. It can lead to loss of function for a while, and sometimes can damage the brain forever.

   Jimmy got a concussion after he fell down and hit his head on the concrete.