Grand or stately in a somewhat exaggerated or grotesque manner; having an exaggerated grandeur.
Likely from 'grand' + '-esque' (suffix from Italian/French meaning 'in the manner or style of'). Extremely rare; may be a nonce word or very specialized literary term.
This word is so rare it's almost invisible—it shows how English speakers can theoretically create new words by combining existing pieces, but if nobody uses them, they quietly disappear from language.
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