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English definition of “mortality”

mortality

noun [U]     /mɔːˈtæl.ə.ti/ US  /mɔːrˈtæl.ə.t̬i/ formal
the way that people do not live for ever: Her death made him more aware of his own mortality. → Compare immortalityDeath and dying C2 the number of deaths within a particular society and within a particular period of time: the mortality rate Infant mortality is much higher in the poorest areas of the city.Death and dying
(Definition of mortality noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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