From Longman Dictionary of Contemporary Englishconcussioncon‧cus‧sion /kənˈkʌʃən/ noun 1 MI[uncountable] British English temporary damage to the brain that makes you lose consciousness or feel sick for a short time, usually caused by something hitting your headwith concussion He was taken into hospital with concussion.2 MI[countable] American English an injury to the brain that makes you lose consciousness or feel sick for a short time, usually caused by something hitting your head I had a concussion, a broken leg and some minor injuries. He suffered a mild/serious concussion as a result of the accident. 3 [countable usually singular] a violent shaking movement, caused by the very loud sound of something such as an explosion The ground shuddered and heaved with the concussion of the blast.
Examples from the Corpus
concussion• I went to the doctor and he agreed that it was like a concussion and that I should go home.• The risk of serious brain injury with a concussion is very, very low.• This means it avoids rotational forces on its brain, which tend to shear neuronal connections and cause concussion.• He was rushed to hospital with cerebral concussion and a smashed-up face.• The doctor said it could have been a mild concussion.• An Aikman-Turner rematch would be several years and a handful of concussions too late.• The man has a broken thigh and the woman severe concussion.• I was unconscious for five hours, and suffered concussion and fractures.• Even if the shrapnel misses, the concussion will knock you down.• The concussion blew him off his seat and shattered the window.with concussion• Mrs Miller had been rushed into hospital with concussion after having walked into a tree in the pitch dark.• The risk of serious brain injury with a concussion is very, very low.• And they were unlucky to have hooker Malcolm Thomason carried off with concussion midway through the half.• Ansah was carried off with concussion at Luton on Saturday, but had a precautionary brain scan and reported fit this morning.• Palace had Andy Thorn stretchered off with concussion, but he was given the all-clear after X-rays.• Nine police were taken to hospital, one with concussion, and 18 others had minor injuries.• The jockey collided with a pedestrian, knocked himself out and is sidelined with concussion.• I was in bed for a week with concussion and the doctor said at first he thought I'd got a broken pelvis.Origin concussion (1500-1600) Latin concussio, from concutere “to shake violently”, from com- ( → COM-) + quatere “to shake” 