Definition of grandiose
1
: characterized by affectation of grandeur or splendor or by absurd exaggeration
They did not believe his grandiose claims.
2
: impressive because of uncommon largeness, scope, effect, or grandeur
had grandiose plans for the city
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Merriam-Webster unabridged
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Time Traveler for grandiose
The first known use of grandiose was in 1818
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