mortality mortality /mɔrˈtæləti/

noun

1. () The quality or state of being mortal  ( mortality )
   the quality or state of being mortal
     The awareness of mortality reminded them to live each day to the fullest.
   The awareness of mortality reminded them to live each day to the fullest.
   
2. The ratio of deaths in an area to the population of that area; expressed per 1000 per year  ( death rate , deathrate , fatality rate , mortality , mortality rate )
   the ratio of deaths in an area to the population of that area; expressed per 1000 per year