Meaning of “concussion” in the English Dictionary

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"concussion" in British English

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(Definition of “concussion” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"concussion" in American English

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concussionnoun [ C ]

us /kənˈkʌʃ·ən/

a usually temporary injury to the brain caused by a fall or hit on the head or by violent shaking

(Definition of “concussion” from the Cambridge Academic Content Dictionary © Cambridge University Press)