OSTENTA'TIOUS, adjective 1. Making a display from vanity; boastful; fond of presenting one's endowments or works to others in an advantageous light. Your modesty is so far from being ostentatious of the good you do - 2. Showy; gaudy; intended for vain display; as ostentatious ornaments.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI