concussion
noun
con·cus·sion kən-ˈkə-shən 
1
a
: a stunning, damaging, or shattering effect from a hard blow
especially : a jarring injury of the brain resulting in disturbance of cerebral function
The football player suffered a concussion.
b
: a hard blow or collision
2
: agitation, shaking
The concussion from the explosion was felt 12 miles away.
concussive
kən-ˈkə-siv
adjective 
Synonyms
- bump
- collision
- crash
- impact
- impingement
- jar
- jolt
- jounce
- kick
- shock
- slam
- smash
- strike
- wallop
See all Synonyms & Antonyms 
Example Sentences
She suffered a severe concussion after falling on the ice. He went to hospital with concussion.
Recent Examples on the Web Joshua Palmer cleared concussion protocol and returned to practice. 
Jeff Miller, Los Angeles Times, 24 Aug. 2022 Chicago was missing guard Courtney Vandersloot for concussion protocol in the last game, but hope to have her back soon. Fox News, 19 July 2022 Chicago was missing guard Courtney Vandersloot for concussion protocol in the last game, but hope to have her back soon. Doug Feinberg, BostonGlobe.com, 19 July 2022 By the way, the Jazz’s other two-way guy, Johnny Juzang, was in a car accident shortly after arriving in Salt Lake City, and is now in the NBA’s concussion protocol. Andy Larsen, The Salt Lake Tribune, 6 July 2022 The seven rules that go into effect in July encompass jockey safety (including a national concussion protocol), the riding crop and how often riders can use it during a race, racetrack accreditation and reporting of training and veterinary records. Stephen Whyno, Baltimore Sun, 9 June 2022 Later in the meet Crusaders coach Matt Bergan said Nicholas had returned to the stadium and was in concussion protocol. Mark Stewart, Journal Sentinel, 5 June 2022 Busch will miss his fourth consecutive race on Sunday with concussion-like symptoms, which has put his playoff berth in jeopardy. Jenna Fryer, ajc, 12 Aug. 2022 Kurt Busch is missing his third straight race with concussion-like symptoms after crashing July 23 in qualifying at Pocono Raceway. Mark Heim | Mheim@al.com, al, 7 Aug. 2022 See More
Jeff Miller, Los Angeles Times, 24 Aug. 2022 Chicago was missing guard Courtney Vandersloot for concussion protocol in the last game, but hope to have her back soon. Fox News, 19 July 2022 Chicago was missing guard Courtney Vandersloot for concussion protocol in the last game, but hope to have her back soon. Doug Feinberg, BostonGlobe.com, 19 July 2022 By the way, the Jazz’s other two-way guy, Johnny Juzang, was in a car accident shortly after arriving in Salt Lake City, and is now in the NBA’s concussion protocol. Andy Larsen, The Salt Lake Tribune, 6 July 2022 The seven rules that go into effect in July encompass jockey safety (including a national concussion protocol), the riding crop and how often riders can use it during a race, racetrack accreditation and reporting of training and veterinary records. Stephen Whyno, Baltimore Sun, 9 June 2022 Later in the meet Crusaders coach Matt Bergan said Nicholas had returned to the stadium and was in concussion protocol. Mark Stewart, Journal Sentinel, 5 June 2022 Busch will miss his fourth consecutive race on Sunday with concussion-like symptoms, which has put his playoff berth in jeopardy. Jenna Fryer, ajc, 12 Aug. 2022 Kurt Busch is missing his third straight race with concussion-like symptoms after crashing July 23 in qualifying at Pocono Raceway. Mark Heim | Mheim@al.com, al, 7 Aug. 2022 See More Word History
Etymology
Middle English concussioun, from Latin concussion-, concussio, from concutere to shake violently, from com- + quatere to shake
First Known Use
14th century, in the meaning defined at sense 1a
Phrases Containing concussion
Kids Definition
concussion
noun
con·cus·sion kən-ˈkə-shən
: injury to the brain caused by a hard hit on the head
Medical Definition
concussion
noun
con·cus·sion kən-ˈkəsh-ən
1
: a hard blow or collision
2
: a condition resulting from the stunning, damaging, or shattering effects of a hard blow
especially : a jarring injury of the brain resulting in disturbance of cerebral function and sometimes marked by permanent damage
concussions
noun
1
as in collisions
a forceful coming together of two things the concussion of the two football players sent them both to the ground Synonyms & Similar Words
Relevance
- collisions
- impacts
- crashes
- shocks
- jolts
- thumps
- bumps
- blows
- impingements
- slams
- encounters
- contacts
- slaps
- punches
- jounces
- kicks
- hits
- strikes
- wallops
- jars
- knocks
- batterings
- raps
- thrashings
- bashings
- buffets
- smashes
- lickings
- touches
- meetings
2
as in crashes
the violent coming together of two bodies into destructive contact the theory that such a concussion, by a giant asteroid or comet millions of years ago, led to the extinction of the dinosaurs Synonyms & Similar Words
- collisions
- crashes
- accidents
- wrecks
- smashups
- pileups
- crack-ups
- ruins
- destructions
- smashes
- demolishments