Definition of mortality noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//mɔːˈtæləti//
    ; NAmE NAmE//mɔːrˈtæləti//
    (pl. mortalities)
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  1. 1[uncountable] the state of being human and not living for ever After her mother's death, she became acutely aware of her own mortality.
  2. 2[uncountable] the number of deaths in a particular situation or period of time the infant mortality rate (= the number of babies that die at or just after birth) Mortality from lung cancer is still increasing.
  3. 3[countable] (specialist) a death hospital mortalities (= deaths in hospital)
  4. Word Originlate Middle English: via Old French from Latin mortalitas, from mortalis, from mors, mort- ‘death’.Extra examples Poor hygiene led to high mortality among children. The disease has caused widespread mortality. a condition that often results in premature mortality a lower annual mortality from cancer measures that should reduce infant mortality
See the Oxford Advanced American Dictionary entry: mortality