Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

Medical Dictionary

concussion

play
noun con·cus·sion \kən-ˈkəsh-ən\

Medical Definition of concussion

  1. 1:  a hard blow or collision

  2. 2:  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

concussive \-ˈkəs-iv\play adjective




Seen and Heard

What made you want to look up concussion? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

the Celtic May Day festival

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image567572573

Which of these is a synonym of unctuous?

maudlin prompt oily angry
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ