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

 

keen

 verb
verb
BrE BrE//kiːn//
 
; NAmE NAmE//kiːn//
 
Verb Forms present simple I / you / we / they keen
BrE BrE//kiːn//
 
; NAmE NAmE//kiːn//
 
he / she / it keens
BrE BrE//kiːnz//
 
; NAmE NAmE//kiːnz//
 
past simple keened
BrE BrE//kiːnd//
 
; NAmE NAmE//kiːnd//
 
past participle keened
BrE BrE//kiːnd//
 
; NAmE NAmE//kiːnd//
 
-ing form keening
BrE BrE//ˈkiːnɪŋ//
 
; NAmE NAmE//ˈkiːnɪŋ//
 
 
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[intransitive] (usually used in the progressive tenses) (old-fashioned) to make a loud high sad sound, when somebody has died Word Originverb mid 19th cent.: from Irish caoinim ‘I wail’.
See the Oxford Advanced American Dictionary entry: keen