1 more -- 額外地；另外；外加
2 something that you can get with something else if you pay a little more money -- 另外付費就可額外得到的東西
3 a person in a film who does not have a speaking part and who is usually part of the scene, for example, in a crowd -- （電影中的）臨時演員，群眾演員
4 a point given to one cricket team if the other team makes an illegal mistake when bowling -- 額外得分（板球中一隊在敵隊發球犯規時所得的分數）
5 outside or in addition to -- 在…之外；超出；越出
extraterrestrial beings (= imaginary creatures which come from outside the planet Earth) 外星人
an extramarital affair (= a sexual relationship of a married person with someone other than their husband or wife) 婚外情
extracurricular activities (= activities which are not part of the usual school or college course) 課外活動
Have you warned them that there will be an extra person for dinner?
Do you have to pay extra for installation?
It won't cost much extra, so we might just as well stay for another night.
They charge extra for any additional passengers.
