VAINGLO'RIOUS, adjective [vain and glorious.] 1. Vain to excess of one's own achievements; elated beyond due measure; boastful. Vainglorious man. 2. Boastful; proceeding from vanity. Arrogant and vainglorious expression.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI