1[uncountableU] (also mortality rate / $ .ˈ.../)SSMX the number of deaths during a particular period of time among a particular type or group of people 死亡率;死亡数
Mortality from heart disease varies widely across the world.
心脏病死亡率世界各地差异很大。
infant/child/maternal/adult mortality
an appallingly high infant mortality rate (=number of babies who die)