Definition of foolproof

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  • foolproof is a valid Scrabble US word with a point value of 17
  • foolproof is a valid Scrabble UK word with a point value of 17
  • foolproof is a valid Words with friends word with a point value of 19

Definition of foolproof

  • not liable to failure (adjective)

    Examples

    1. a foolproof identification system

    Synonyms

    1. unfailing
  • proof against human misuse or error (verb)

    Examples

    1. foolproof this appliance

    Synonyms

    1. goof-proof
    2. goofproof

See definition of foolproof in Merriam Webster