Definition of foolproof in English:

foolproof

adjective

  • Incapable of going wrong or being misused.

    ‘a foolproof security system’
    • ‘These examples should not be considered foolproof systems or events possible only in developed economies.’
    • ‘However, this is not a foolproof system as not all marketing firms are signed-up.’
    • ‘Letters coming to MEPs in Brussels are scanned, but the system is not foolproof.’
    • ‘They are supposed to be foolproof and guaranteed to keep horses and jockeys safe, and to open in unison.’
    • ‘The foolproof system gives little room for manipulation by the conductor.’
    • ‘Come up with a foolproof security system and stop other men like you from stealing priceless works of art.’
    • ‘Now, no one wants the president assassinated, but the reality is no security is foolproof.’
    • ‘See that your dive boat has a foolproof checking system, whether in the form of a roll-call or an effective tagging system.’
    • ‘While you could just write random addresses in Amsterdam we have a foolproof system in place.’
    • ‘While you could just write to random addresses in Timbuktu, we have a foolproof system in place.’
    • ‘It's a pretty complex system with some safeguards, but not foolproof, as you know.’
    • ‘True, democracy and the rule of law provide no foolproof security guarantee.’
    • ‘We must take the initiative with regard to food labelling, with the critical aim of putting in place a foolproof system.’
    • ‘Since the Christmas holidays, my foolproof, and copyrighted, two-stage sleeping system has been failing.’
    • ‘I am writing to assure you that my operation is completely safe and foolproof.’
    • ‘Companies that can offer safe and foolproof connections stand to rise to the top.’
    • ‘Bee-eaters have worked out a foolproof security system for the nest.’
    • ‘Now we need to make sure that the system is as foolproof as possible.’
    • ‘The State has yet to fine tune a foolproof system by which accidents can be prevented.’
    • ‘It all adds up to an almost foolproof mechanical length measuring system that Les says produces excellent results.’
    infallible, never failing, unfailing, unerring, dependable, reliable, trustworthy, certain, sure, guaranteed, safe, sound, effective, efficacious, tried and tested
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Pronunciation

foolproof

/ˈfuːlpruːf/