mortality

 
Pronunciation: /mɔːˈtalɪti/

noun (plural mortalities)

[mass noun]
  • 1the state of being subject to death: the work is increasingly haunted by thoughts of mortality
  • 2death, especially on a large scale: the causes of mortality among infants and young children
  • (also mortality rate) the number of deaths in a given area or period, or from a particular cause: post-operative mortality was 90 per cent for some operations

Origin:

late Middle English: via Old French from Latin mortalitas, from mortalis (see mortal)