11 letters · 11 points in Scrabble
noun a gaudy outward display
noun lack of elegance as a consequence of being pompous and puffed up with vanity
noun pretentious or showy or vulgar display
originOriginated 1425–75 from late Middle English ostentacioun, borrowed from Middle French ostentation and its etymon Latin ostentātiō, ostentātiōnem, equivalent to ostentātus (past participle of ostentāre, to display or exhibit), frequentative of ostendere (“to present, display”) + -iōn. By surface analysis, ostent + -ation.
Etymology from Wiktionary, CC BY-SA 3.0