Mortality (noun)

1. The state of being subject to death.
2. The number of deaths in a particular population or group, typically expressed as a rate per 1000 or 100 000 of the population.

Origin:

Late middle english: from old french mortalite, from latin mortalitas, from mortalis "deadly", from mors, mort- "death".

Examples:

1. Life expectancy has increased thanks to advances in medicine and a reduction in overall mortality rates.
2. The study found a correlation between poverty and increased mortality rates in the area.
3. There has been a sharp rise in the mortality rate due to the recent outbreak of the disease.
4. The high infant mortality rate is a serious concern for the government.
5. The elderly have a higher mortality rate compared to the younger population.