We found 33 dictionaries that define the word fail safe:

General (21 matching dictionaries)

1. fail-safe: Merriam-Webster
2. fail-safe: Oxford Learner's Dictionaries
3. fail-safe: American Heritage Dictionary of the English Language
4. fail-safe, fail-safe: Collins English Dictionary
5. fail-safe: Vocabulary.com
6. Fail-Safe, Fail-safe, fail-safe: Wordnik
7. fail-safe: Cambridge Advanced Learner's Dictionary
8. fail-safe: Wiktionary
9. fail-safe: Webster's New World College Dictionary, 4th Ed.
10. fail-safe: The Wordsmyth English Dictionary-Thesaurus
11. fail-safe: Infoplease Dictionary
12. fail-safe, fail safe: Dictionary.com
13. fail-safe: Cambridge Essential American English Dictionary
14. Fail-Safe (novel), Fail Safe, Fail-safe, Fail-safe (disambiguation), Fail safe: Wikipedia, the Free Encyclopedia
15. fail-safe: Rhymezone
16. fail-safe: FreeDictionary.org
17. fail-safe: Mnemonic Dictionary
18. fail-safe: TheFreeDictionary.com
19. fail safe: Longman Dictionary of Contemporary English

Business (3 matching dictionaries)

20. MoneyGlossary.com (No longer online)
21. INVESTORWORDS (No longer online)
22. BusinessDictionary.com (No longer online)

Computing (5 matching dictionaries)

23. fail-safe: Webster's New World Hacker Dictionary
24. Fail Safe: Cybernetics and Systems
25. fail-safe: Hacking Lexicon
26. I T Glossary (No longer online)
27. fail-safe, fail safe: Encyclopedia

Medicine (1 matching dictionary)

28. Fail Safe, fail-safe: Medical dictionary

Slang (1 matching dictionary)

29. fail safe: Urban Dictionary

Tech (2 matching dictionaries)

30. fail-safe: Chapters in the Sky
31. FAIL SAFE: Power Engineering

Definitions from Wiktionary (Fail safe) ▸ verb:  (intransitive) Alternative form of fail-safe (verb with differing inflections) [To compensate automatically, in the event of a failure.] Similar: safe, secure, safen, withsave, safekeep, ensafe, ensure, assecure, protect, fore-save, more... Opposite: foolproof, reliable, secure, infallible Adjectives: deferent, accommodate, recipient, acceptant, exact, suscipient, saught, avail, secure, safe, clear ▸ Words similar to fail safe ▸ Usage examples for fail safe ▸ Idioms related to fail safe ▸ Wikipedia articles (New!) ▸ Words that often appear near fail safe ▸ Rhymes of fail safe ▸ Invented words related to fail safe