foolproof
adjective
fool·proof
ˈfül-ˌprüf 
: 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 on the Web
No method is completely foolproof, so avoiding contaminated water remains the safest strategy.
—
Ryan Brennan, Kansas City Star, 16 June 2026
Jumpsuits are one of the most foolproof ways to pull together an outfit with minimal effort.
—Sophie Dodd, Travel + Leisure, 12 June 2026
Fortunately, Mike, AKA the Avocado Whisperer, has a foolproof plan to ensure top-top avocados.
—Matt Reigle Outkick, FOXNews.com, 10 June 2026
There are no foolproof safety guarantees, but parents should prioritize investing time in some sort of hands-on driving course.
—Doug Turnbull, AJC.com, 7 June 2026
See All Example Sentences for foolproof
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Ryan Brennan, Kansas City Star, 16 June 2026
Jumpsuits are one of the most foolproof ways to pull together an outfit with minimal effort.
—Sophie Dodd, Travel + Leisure, 12 June 2026
Fortunately, Mike, AKA the Avocado Whisperer, has a foolproof plan to ensure top-top avocados.
—Matt Reigle Outkick, FOXNews.com, 10 June 2026
There are no foolproof safety guarantees, but parents should prioritize investing time in some sort of hands-on driving course.
—Doug Turnbull, AJC.com, 7 June 2026
See All Example Sentences for foolproof
Cite this Entry
“Foolproof.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/foolproof. Accessed 17 Jun. 2026.
Copy CitationKids Definition
foolproof
adjective
fool·proof
ˈfül-ˈprüf
: done, made, or planned so well that nothing can go wrong
foolproof directions
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