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grandiose (adj.)

1828 (earlier as a French word in English), from French grandiose "impressive, grand in effect" (18c.), from Italian grandioso (which also was borrowed directly into English as a musical term), from Latin grandis "big" (see grand (adj.)). Related: Grandiosely.

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Definitions of grandiose from WordNet

grandiose (adj.)
impressive because of unnecessary largeness or grandeur; used to show disapproval;
grandiose (adj.)
affectedly genteel;
Synonyms: hifalutin / highfalutin / highfaluting / hoity-toity / la-di-da
From wordnet.princeton.edu