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concussion

noun

/kənˈkʌʃən/

Meaning

A temporary unconsciousness or shock caused by a blow to the head.

He suffered a concussion after falling from the bike.

brain injury, trauma, shock, head injury

health, wellness

mild concussion, severe concussion, concussion symptoms, concussion treatment

A person who travels in a vehicle but is not driving it

a subtle difference in meaning, expression, or sound

a hard sedimentary rock, composed mainly of calcium carbonate or dolomite, used as building material...

The act of formally proposing someone for a role, position, or award.

Close observation, especially of a suspected spy or criminal.

a particular area of activity or interest that someone focuses on; expertise in a specific field