Definition of genteelly adverb from the Oxford Advanced Learner's Dictionary

 

genteelly

 adverb
adverb
BrE BrE//dʒenˈtiːlli//
 
; NAmE NAmE//dʒenˈtiːlli//
 
(sometimes disapproving)
 
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in a way that is quiet and polite, often in an exaggerated way, pretending to be from a high social class