English

Definition of serene adjective from the Oxford Advanced Learner's Dictionary

 

serene

 adjective
adjective
BrE BrE//səˈriːn//
 
; NAmE NAmE//səˈriːn//
 
 
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calm and peaceful a lake, still and serene in the sunlight Word Origin late Middle English (describing the weather or sky as ‘clear, fine, and calm’): from Latin serenus.
See the Oxford Advanced American Dictionary entry: serene