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Definition of Fail-safe
1. Noun. A mechanism capable of returning to a safe state in case there is a failure or malfunction.
Generic synonyms: Mechanism
2. Adjective. Guaranteed not to fail. "A fail-safe recipe for cheese souffle"
Similar to: Secure
3. Adjective. Eliminating danger by compensating automatically for a failure or malfunction. "A fail-safe device in a nuclear weapon to deactivate it automatically in the event of accident"
Similar to: Safe
Lexicographical Neighbors of Fail-safe
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