the main woman singer in an opera performance or an opera company （歌剧演出或歌剧团的）首席女歌唱演员，女主角演员
(disapproving) a person who thinks they are very important because they are good at sth, and who behaves badly when they do not get what they want 妄自尊大而爱闹脾气者；恃才傲物