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

 

vainglorious

 adjective
adjective
BrE BrE//ˌveɪnˈɡlɔːriəs//
 
; NAmE NAmE//ˌveɪnˈɡlɔːriəs//
 
(literary, disapproving) Proud
 
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too proud of your own abilities or achievements See related entries: Proud Word Origin Middle English: suggested by Old French vaine gloire, Latin vana gloria + -ious.
See the Oxford Advanced American Dictionary entry: vainglorious