English

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

 

grandiose

 adjective
adjective
BrE BrE//ˈɡrændiəʊs//
 
; NAmE NAmE//ˈɡrændioʊs//
 
(disapproving)
 
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seeming very impressive but too large, complicated, expensive, etc. to be practical or possible The grandiose scheme for a journey across the desert came to nothing. a grandiose opera house He could no longer live the grandiose lifestyle to which he had become accustomed. Word Origin mid 19th cent.: from French, from Italian grandioso, from grande ‘grand’.
See the Oxford Advanced American Dictionary entry: grandiose