The fact of something being lethal; the ability of something to kill.
The degree of lethal (mortal) danger that something (usually a disease or a weapon) presents; the magnitude of its power to kill organisms exposed to it; this property is indirectly measured by any of various proxy rates, including mortality rate, case fatality rate, or infection fatality rate (for diseases) or kill rate (for weapons, pesticides, or parasites).
The state of being susceptible to death.
The number of deaths per given unit of population over a given period of time.
Death.
Deaths resulting from an event (such as a war, epidemic or disaster).