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

 

pretentiously

 adverb
adverb
BrE BrE//prɪˈtenʃəsli//
 
; NAmE NAmE//prɪˈtenʃəsli//
 
(disapproving)
 
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in a way that tries to appear important, intelligent, etc. in order to impress other people; in a way that tries to be something that you are not, in order to impress The screen pretentiously displays a sombre quotation about war.