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Definition of fail-safe adjective from the Oxford Advanced Learner's Dictionary

fail-safe

adjective

/ˈfeɪl seɪf/

/ˈfeɪl seɪf/

[usually before noun]

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(of machinery or equipment) designed to stop working if anything goes wrong
- a fail-safe device/mechanism/system
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See fail-safe in the Oxford Advanced American Dictionary

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