Definition of concussion
1a
: a stunning, damaging, or shattering effect from a hard blow
especially
: a jarring injury of the brain resulting in disturbance of cerebral function
The football player suffered a concussion.
b
: a hard blow or collision
Test Your Vocabulary
Great Words for Scrabble
-
- Which of the following Q-without-U words means the number five in cards or dice?

Test your visual vocabulary with our 10-question challenge!
TAKE THE QUIZ
A daily challenge for crossword fanatics.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Share concussion
Time Traveler for concussion
The first known use of concussion was in the 14th century
See more words from the same century