Definition of foolproof
: so simple, plain, or reliable as to leave no opportunity for error, misuse, or failure a foolproof plan
Examples of foolproof in a Sentence
DNA fingerprinting gives police a virtually foolproof way to link a suspect to a crime scene.
Recent Examples of foolproof from the Web
Wendell Hargrave, who oversees prison security, said there’s no foolproof system for stopping contraband.
Above, five foolproof interview looks worth shopping now.
The designers not only managed to make the treatment foolproof but increased compliance by hacking a local superstition, that fish are auspicious.
However, the Whizzinator is not foolproof or undetectable, as five Texas men discovered.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'foolproof'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use of foolproof
FOOLPROOF Defined for English Language Learners
Definition of foolproof for English Language Learners
: done, made, or planned so well that nothing can go wrong
FOOLPROOF Defined for Kids
Definition of foolproof for Students
: done, made, or planned so well that nothing can go wrong a foolproof recipe
Seen and Heard
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