fail-safe Meaning, definition in Cambridge English Dictionary
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Meaning of "fail-safe" - English Dictionary

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fail-safeadjective

uk   us   /ˈfeɪ.l.seɪf/
very unlikely to fail: a fail-safe plan If something is fail-safe, it has been designed so that if one part of it does not work, the whole thing does not become dangerous: a fail-safe device
(Definition of fail-safe from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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