kənˈkəshən noun
( -s )
Etymology: Middle French or Latin; Middle French, from Latin concussion-, concussio, from concussus (past participle of concutere to shake violently, from com- + -cutere, from quatere to shake) + -ion-, -io -ion — more at quash
1.
a. : jolting , shaking , agitating
b. : a smart or hard knock, blow, or collision ; also : the shock of such a blow : a stunning, damaging, or shattering effect from such a blow
wood, which responds to concussion with living vibration — Willa Cather
it is the constant concussion of the cream in the churn which causes the butterfat to gather — Westralian Farmers Co-op, Gazette
2. civil law , obsolete : a forcing by threats
3. : a jarring injury of the brain resulting in disturbance of cerebral function and sometimes marked by permanent damage ; also : the condition of having been so injured
4. : an inflammatory condition of the feet of horses caused by repeated violent contacts with hard roads
Synonyms: see impact