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WordReference Random House Learner's Dictionary of American English © 2024con•cus•sion /kənˈkʌʃən/USA pronunciation n. [countable]- Pathologyinjury to the brain due to a blow or a fall:He suffered a mild concussion in the football game.
- the act or action of violently shaking or jarring:concussions from the huge mortar shells.
con•cus•sive /kənˈkʌsɪv/USA pronunciation adj. WordReference Random House Unabridged Dictionary of American English © 2024con•cus•sion (kən kush′ən),USA pronunciation n. - Pathologyinjury to the brain or spinal cord due to jarring from a blow, fall, or the like.
- shock caused by the impact of a collision, blow, etc.
- the act of violently shaking or jarring.
- Latin concussiōn- (stem of concussiō) a shaking. See concuss, -ion
- 1350–1400; Middle English
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