Definition of mortality
1 : the quality or state of being mortal Her husband's death reminded her of her own mortality.
2 : the death of large numbers (as of people or animals) trying to reduce infant mortality
3 archaic : death
4 : the human race that natural extinction to which all mortality is subject — Thomas Paine
5a : the number of deaths in a given time or place The mortality among the infected mounted daily.b : the proportion of deaths to population a brain infection with a mortality rate of about 30 percent — Jane E. Brodyc : the number lost or the rate of loss or failure the mortality rate of small businesses
Examples of mortality in a Sentence
a leading cause of mortality
Did You Know?
Young people tend to assume they will never die; but a person's sense of his or her mortality generally increases year by year, and often increases greatly after a serious accident or illness. Still, many people refuse to change behaviors that would improve their chances of living into old age. Mortality rates are calculated by government agencies, insurance companies, and medical researchers. Infant mortality rates (the rate at which infants die in childbirth) provide a good indicator of a country's overall health; in recent years, the rates in countries like Iceland, Singapore, and Japan have been much better than in the U.S.
First Known Use of mortality
MORTALITY Defined for English Language Learners
Definition of mortality for English Language Learners
: the quality or state of being a person or thing that is alive and therefore certain to die : the quality or state of being mortal
: the death of a person, animal, etc.
: the number of deaths that occur in a particular time or place
Medical Definition of mortality
Seen and Heard
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