1 an important official job that sb is sent somewhere to do, especially to another country 任务；使命: Your mission is to send back information about the enemy's movements. 你的任务就是把有关敌人行动的情报送回来。

2 a group of people who are sent to a foreign country to perform a special task （派往外国执行特别任务的）代表团: a British trade mission to China 英国派往中国的贸易代表团

3 a special journey made by a spacecraft or military aircraft （航天器或军用飞机的）飞行任务: a mission to the moon 往月球的飞行任务

4 a place where people are taught about the Christian religion, given medical help, etc by people who are sent from another country to do this (missionaries) 传教所；布道所

5 a particular task which you feel it is your duty to do 使命；天职: Her work with the poor was more than just a job -- it was her mission in life. 她对穷人所做的事不仅仅是一项工作─那是她人生的使命。