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foolproof Line breaks: fool|proof
Pronunciation: /ˈfuːlpruːf/

Definition of foolproof in English:


Incapable of going wrong or being misused: a foolproof security system
More example sentences
  • Bee-eaters have worked out a foolproof security system for the nest.
  • True, democracy and the rule of law provide no foolproof security guarantee.
  • Come up with a foolproof security system and stop other men like you from stealing priceless works of art.
infallible, never failing, unfailing, unerring, dependable, reliable, trustworthy, certain, sure, guaranteed, safe, sound, effective, efficacious, tried and tested;
watertight, airtight, flawless, perfect
informal sure-fire
Definition of foolproof in:
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