1. (尤指伤亡惨重的)灾难，灾祸(如地震、坠机等)
    A disaster is a very bad accident such as an earthquake or a plane crash, especially one in which a lot of people are killed.

    e.g. It was the second air disaster in the region in less than two months...
           这已经是该地区不到两个月内的第二次空难了。
    e.g. Many had lost all in the disaster and were destitute.
           很多人被灾难夺去了一切，变得一无所有。

2. 非常糟糕的事;彻底的失败;不幸
    If you refer to something as a disaster, you are emphasizing that you think it is extremely bad or unacceptable.

    e.g. The whole production was just a disaster!
           整个产品简直就是一个败笔！
    e.g. It would be a disaster for them not to reach the semi-finals...
           如果不能挺进半决赛，对他们来说就是完败。

3. 灾祸;祸患
    Disaster is something which has very bad consequences for you.

    e.g. The government brought itself to the brink of fiscal disaster...
           政府把自己推向了财政危机的边缘。
    e.g. 'The potential for disaster is enormous,' he says.
           “这将会祸患无穷，”他说道。

4. 没有什么好结果；后患无穷
    If you say that something is a recipe for disaster, you mean that it is very likely to have unpleasant consequences.

disaster的翻译