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late 15c., "quality of causing death," from French fatalité, from Late Latin fatalitatem (nominative fatalitas), from Latin fatalis (see fatal). Senses in 16c.-17c. included "determined by fate" and "a destiny." Meaning "an occurrence resulting in widespread death" is from 1840. Related: Fatalities.
fatality fa·tal·i·ty (fā-tāl'ĭ-tē, fə-)
A death resulting from an accident or a disaster.
One that is killed as a result of such an occurrence.