tiara/tɪˈɑ:rə; tɪ`ɑrə/ n1 woman's crescent-shaped head-dress, usu ornamented with jewels and worn on ceremonial occasions （女用）冕状头饰（通常镶有宝石, 礼仪场合戴用）.2 triple crown worn by the Pope 三重冕（天主教教皇戴的）.
牛津英汉双解词典