n.[U]

1. 必死性
2. 死亡数；死亡率[S1]
   maternal mortality

   产妇死亡率

   The mortality from lung cancer is increasing.

   肺癌死亡人数在增多。

3. （事业等的）失败次数；失败率[S1]
4. 人类

n.

1. the state of being mortal.
2. death, especially on a large scale.
   ▸ (also mortality rate) the number of deaths in a given area or period, or from a particular cause.