Usually means: Impossible to fail or misuse.
Definitions Related words Mentions Lyrics History
We found 25 dictionaries that define the word foolproof:

General (23 matching dictionaries)
  1. foolproof: Merriam-Webster
  2. foolproof: Oxford Learner's Dictionaries
  3. foolproof: American Heritage Dictionary of the English Language
  4. foolproof: Collins English Dictionary
  5. foolproof: Vocabulary.com
  6. Foolproof, foolproof: Wordnik
  7. foolproof: Cambridge Advanced Learner's Dictionary
  8. foolproof: Wiktionary
  9. foolproof: Webster's New World College Dictionary, 4th Ed.
  10. foolproof: The Wordsmyth English Dictionary-Thesaurus
  11. foolproof: Infoplease Dictionary
  12. foolproof: Dictionary.com
  13. foolproof: Online Etymology Dictionary
  14. foolproof: Cambridge Essential American English Dictionary
  15. FoolProof, Foolproof (film), Foolproof: Wikipedia, the Free Encyclopedia
  16. foolproof: Rhymezone
  17. foolproof: AllWords.com Multi-Lingual Dictionary
  18. foolproof: FreeDictionary.org
  19. foolproof: Mnemonic Dictionary
  20. foolproof: TheFreeDictionary.com
  21. foolproof: Longman Dictionary of Contemporary English

Business (1 matching dictionary)
  1. Foolproof (film), Foolproof (movie), foolproof: Legal dictionary

Slang (1 matching dictionary)
  1. Foolproof: Urban Dictionary

Definitions from Wiktionary (
)
American English Definition British English Definition
adjective:  (of a device) Protected against, or designed to be proof against, misuse or error.
adjective:  (of an idea or plan) Certain to succeed in all eventualities, or claimed to be so; infallible.
verb:  (transitive) To render foolproof.

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