vainglory UK [veɪnˈɡlɔː.ɹi]US [ˈveɪnˌɡlɔɚ.i]noun 4verb 1forms 3 noun4 •Excessive vanity. •Boastful, unwarranted pride in one's accomplishments or qualities. •A regarding of oneself with undue favor. •Vain, ostentatious display. verb1 •To boast; to act in a vain manner. formsvaingloried · vainglorying · vainglories