What does survivability mean?
Survivability means the capacity to survive, or to remain functional, when faced with conditions that could cause death, injury, destruction, or failure. The word is especially common in engineering, defence, transport, safety assessment, and biology. A vehicle's survivability, for example, concerns how well it can withstand crashes, attacks, extreme temperatures, or equipment failures; an organism's survivability concerns its ability to live under particular environmental stresses. The term usually emphasizes endurance in the presence of hazards rather than ordinary performance or comfort. It can also appear in formal analyses of a person's or group's chances of surviving a dangerous event. Although related to survival, survivability more specifically names the quality or assessed degree of being able to endure those circumstances. It is a precise term when discussing resilience under adversity, although survival itself is often the more idiomatic choice in general conversation.
nounThe quality or condition of being able to survive, especially the ability of a person, organism, structure, or system to remain alive or operational when exposed to hazards, stress, damage, or failure.
- The capacity of a person, organism, or other living thing to remain alive, especially under hazardous or difficult conditions.
- The extent to which a structure, vehicle, machine, or system remains safe, functional, or serviceable when exposed to specified threats, stresses, or damage.
"The engineers tested the vehicle's survivability under simulated blast and fire conditions."
"Extreme weather can reduce the survivability of some species in a changed habitat."
"The design review focused on the power system's survivability after a major equipment failure."
Rare and generally restricted to contexts comparing the separate survivability ratings of different systems, species, or scenarios; the noun is normally used without a plural.
"The study compared the survivabilities of the two designs under extreme conditions."
Survivability asks not merely whether something works, but whether it can keep working long enough to matter.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does survivability come from?
Survivability was formed in English from survive and the suffix -ability, which creates a noun denoting capacity or quality. Survive comes through Old French from Latin supervivere, a compound of super-, meaning over or beyond, and vivere, meaning to live. Related English words include survival, survivor, and survivable, while viable belongs to a wider family ultimately connected with the same Latin root for life.
How survivability is actually used
Survivability is formal and especially common in engineering, military, safety, and biological contexts. Outside technical writing, it may sound impersonal, so survival or the prospect of survival is often more natural when discussing people.
Easily confused with survivability
Survivability is the noun naming a capacity or quality, whereas survivable is the adjective describing something that can survive.