/mawr tal"i tee/ , n. , pl. mortalities .
1. the state or condition of being subject to death; mortal character, nature, or existence.
2. the relative frequency of deaths in a specific population; death rate.
3. mortal beings collectively; humanity.
4. death or destruction on a large scale, as from war, plague, or famine.
5. Obs. death.
[ 1300-50; ME mortalite mortalitas. See MORTAL, -ITY ]