mor·tal·i·ty 
/moɚˈtæləti/ noun
plural mor·tal·i·ties /moɚˈtæləti/ noun 1 [noncount] : 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 news of her cousin's death reminded her of her own mortality. [=reminded her that she would also die some day] — opposite immortality 2 : the death of a person, animal, etc. [count] ▪ cancer mortalities [=deaths caused by cancer] [noncount] ▪ a leading cause of mortality 3 [noncount] : the number of deaths that occur in a particular time or place
▪ a decrease in cancer mortality [=a decrease in the number of people dying from cancer] ▪ The government is trying to reduce infant mortality. = The government is trying to reduce the mortality rate among infants. [=trying to reduce the number of infants who die each year]
▪ The news of her cousin's death reminded her of her own mortality. [=reminded her that she would also die some day] — opposite immortality
▪ a decrease in cancer mortality [=a decrease in the number of people dying from cancer] ▪ The government is trying to reduce infant mortality. = The government is trying to reduce the mortality rate among infants. [=trying to reduce the number of infants who die each year]
