Fail-safe — definition

1. fail-safe (Adjective)

fail-safe (Adjective) — Guaranteed not to fail. ex. "a fail-safe recipe for cheese souffle"

fail-safe (Adjective) — Eliminating danger by compensating automatically for a failure or malfunction. ex. "a fail-safe device in a nuclear weapon to deactivate it automatically in the event of accident"

2. fail-safe (Noun)

fail-safe (Noun) — A mechanism capable of returning to a safe state in case there is a failure or malfunction.

mechanism