Definition of concuss verb from the Oxford Advanced American Dictionary

 

concuss

 verb
verb
NAmE//kənˈkʌs//
 
concuss somebodyVerb Forms present simple I / you / we / they concuss
 
he / she / it concusses
 
past simple concussed
 
-ing form concussing
 
 
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to hit someone on the head, making them become unconscious or confused for a short time
 
adjective She was concussed after the fall.
See the Oxford Advanced Learner's Dictionary entry: concuss