Definition of insincerity noun from the Oxford Advanced Learner's Dictionary

 

insincerity

 noun
noun
BrE BrE//ˌɪnsɪnˈserəti//
 
; NAmE NAmE//ˌɪnsɪnˈserəti//
 
(disapproving)[uncountable]
 
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the act or practice of saying or doing something that you do not really mean or believe She accused him of insincerity.