See also: fail-safe and failsafe

English

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Verb

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fail safe (third-person singular simple present fails safe, present participle failing safe, simple past and past participle failed safe)

  1. (intransitive) Alternative form of fail-safe (verb with differing inflections)
    • 2021 November 17, Christian Wolmar, “Misleading statements lead to ill-informed speculation”, in RAIL, number 944, page 44:
      Anyone with the remotest knowledge of railway signalling knows that it always fails safe.