Definition of brain verb from the Oxford Advanced Learner's Dictionary

 

brain

 verb
verb
BrE BrE//breɪn//
 
; NAmE NAmE//breɪn//
 
Verb Forms present simple I / you / we / they brain
BrE BrE//breɪn//
 
; NAmE NAmE//breɪn//
 
he / she / it brains
BrE BrE//breɪnz//
 
; NAmE NAmE//breɪnz//
 
past simple brained
BrE BrE//breɪnd//
 
; NAmE NAmE//breɪnd//
 
past participle brained
BrE BrE//breɪnd//
 
; NAmE NAmE//breɪnd//
 
-ing form braining
BrE BrE//ˈbreɪnɪŋ//
 
; NAmE NAmE//ˈbreɪnɪŋ//
 
 
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brain somebody/something/yourself (informal) to kill a person or an animal by hitting them very hard on the head I nearly brained myself on that low beam. Word Origin Old English brægen, of West Germanic origin; related to Dutch brein.
See the Oxford Advanced American Dictionary entry: brain