• WordNet 3.6
    • n concussion any violent blow
    • n concussion injury to the brain caused by a blow; usually resulting in loss of consciousness
    • ***
Webster's Revised Unabridged Dictionary
  • Interesting fact: Russian I.M. Chisov survived a 21,980 plunge out of a plane with no parachute. He landed on the steep side of a snow-covered mountain with only a fractured pelvis and slight concussion
    • Concussion (Med) A condition of lowered functional activity, without visible structural change, produced in an organ by a shock, as by fall or blow; as, a concussion of the brain.
    • Concussion A shaking or agitation; a shock; caused by the collision of two bodies. "It is believed that great ringing of bells, in populous cities, hath dissipated pestilent air; which may be from the concussion of the air."
    • Concussion (Civil Law) The unlawful forcing of another by threats of violence to yield up something of value. "Then concussion , rapine, pilleries,
      Their catalogue of accusations fill."
    • ***
Century Dictionary and Cyclopedia
    • n concussion The act of shaking or agitating, particularly by the stroke or impact of another body.
    • n concussion The state of being shaken; the shock occasioned by two bodies coming suddenly and violently into collision; shock; agitation.
    • n concussion In surgery, injury sustained by the brain or other viscera, as from a fall, a blow, etc.
    • n concussion In civil law, the act of extorting money or something of value by violence or threats of violence; extortion.
    • ***
Chambers's Twentieth Century Dictionary
    • n Concussion state of being shaken: a violent shock caused by the sudden contact of two bodies: any undue pressure or force exerted upon any one
    • ***


Webster's Revised Unabridged Dictionary
L. concussio, fr. concutere, concussum, to shake violenty; con-, + quatere, to shake. See Cashier Quash
Chambers's Twentieth Century Dictionary
L. concussuscon, together, quatĕre, to shake.


In literature:

His attempt to pass between these resulted in a near-concussion of the brain.
"Jokes For All Occasions" by Anonymous
You had a slight concussion, from which you have now recovered.
"Tom and Some Other Girls" by Mrs. George de Horne Vaizey
The concussion jarred his stiffened hands and arms.
"The Gold Trail" by Harold Bindloss
The tones struck against her brain with a thrill of concussion like hail against a roof.
"The Black Cross" by Olive M. Briggs
That the latter must have been of the slightest nature is evident, as no signs of concussion of the spinal cord were noted.
"Surgical Experiences in South Africa, 1899-1900" by George Henry Makins
The boat rocked a little with the concussion, and as the smoke lifted, I saw an arrow drop into the river a long way to our left.
"Mass' George" by George Manville Fenn
It was a piece of shell, and the concussion did the harm.
"Before the Dawn" by Joseph Alexander Altsheler
There may be a little concussion of the brain.
"Sail Ho!" by George Manville Fenn
The concussion staggered them a little, but the mass of ice was turned aside, and they had a few minutes' respite.
"Steve Young" by George Manville Fenn
The stern, by the concussion, incredible as it may seem, had been carried full fifty yards from the rest of the wreck.
"Peter the Whaler" by W.H.G. Kingston
Suddenly there was a concussion which shook the very atmosphere, and made the ships roll and shiver as if struck with an ague.
"True Blue" by W.H.G. Kingston
In such a case, foment the spine at first, to remove the effects of the concussion.
"Papers on Health" by John Kirk
It is a concussion of the brain.
"Deerbrook" by Harriet Martineau
The next moment we heard a dull concussion, as of a heavy body falling to the earth.
"The Desert Home" by Mayne Reid
The concussion put out the lamp, but as soon as it was lighted again Guy ran up to see the result of his attempt.
"The River of Darkness" by William Murray Graydon
The guns are thundering at a terrific rate, the concussions shaking our barracks and rattling the dishes on the table.
"High Adventure" by James Norman Hall
This time the lynx sprang forward to meet it, and I could hear the concussion of their bodies as they came together.
"Popular Adventure Tales" by Mayne Reid
Now and then I could hear the loud bumping of waves as they struck against the bows, and the timbers creaked under the concussions.
"The Boy Tar" by Mayne Reid
Scarcely had the lad spoken before the vessel was shaken by the force of a mighty concussion.
"Boy Scouts in the North Sea" by G. Harvey Ralphson
He fell into a chair with a concussion which shook the building.
"In Connection with the De Willoughby Claim" by Frances Hodgson Burnett

In poetry:

What with your wardrobes stuffed with warrior gear,
Your gander-step parades, your prancing Prussians,
Your menaces that shocked the deafened sphere
With rude concussions;
"Dies Irae " by Sir Owen Seaman

In news:

CHICAGO — Bears quarterback Jay Cutler has left Chicago's game against the Houston Texans because of a concussion.
CHICAGO – Bears quarterback Jay Cutler has left Chicago's game against the Houston Texans because of a concussion.
The New York Mets activated Jason Bay from the disabled list Tuesday, a month after the left fielder suffered a concussion slamming into the outfield wall on an attempted catch on June 15.
Smith and Urlacher are more problem than solution to NFL's dealing with concussions.
NFL needs to get seriousness of concussions through its head.
Concussion puts Konerko on 7-day DL.
Mets' Jason Bay placed on the seven-day concussion DL: Justin Turner activated off DL.
According to multiple sources, the nation's No 24 player in the ESPNU 150 has a mild concussion and is being held out as a precaution.
Significant ' concussion leaves Vick's future cloudy.
Eagles QB Vick has 'pretty significant ' concussion.
Chris Nowinski is the author of "Head Games, Football's Concussion Crisis".
Nick Laham/Getty Images Giants right guard Chris Snee passed his concussion tests today.
Giants right guard Chris Snee passed his concussion tests today and has been cleared to return to practice, according to someone informed of the results of the tests.
Stronger neck can help prevent concussion.
The number of student athletes who have had concussions have quadrupled in just a decade.

In science:

Findings of mild traumatic brain injury in combat veterans with PTSD and a history of blast concussion. J Neuropsychiatry 10, 308-313.
Working toward exposure thresholds for blast-induced traumatic brain injury: thoracic and acceleration mechanisms
Xydakis, M.S., Bebarta V.S., Harrison, C.D., Conner, J.C. and Grant, G.A., 2007. Tympanicmembrane perforation as a marker of concussive brain injury in Iraq.
Working toward exposure thresholds for blast-induced traumatic brain injury: thoracic and acceleration mechanisms