Fail-safe Definition

fālsāf
fail-safe
adjective
Designating, of, or involving a procedure designed to prevent malfunctioning or unintentional operation, often specif. of nuclear-armed aircraft, through an intricate system of protective devices.
Webster's New World
Capable of compensating automatically and safely for a failure, as of a mechanism or power source.
American Heritage
Acting to discontinue a military attack on the occurrence of any of various predetermined conditions.
American Heritage
Guaranteed not to fail.
American Heritage

Alternative form of fail-safe.

Wiktionary
Synonyms:
noun
A fail-safe mechanism.
American Heritage
verb

To compensate automatically, in the event of a failure.

Wiktionary

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