/mɔ:ˈtæləti ||; mɔrˈtælətɪ/noun[U] 1 the number of deaths in one period of time or in one place 死亡率: Infant mortality is high in the region. 这个地区的幼儿死亡率很高。
2 the fact that nobody can live forever （人）必死的事实: He didn't like to think about his own mortality. 他不愿意想到自己的死亡。