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
There are several potential solutions, but none are foolproof.
—
John Romano,
The Orlando Sentinel,
29 June 2026
Two different kinds of potatoes and the foolproof combo of seasonings will see you through this recipe.
—
Patricia S York,
Southern Living,
27 June 2026
The strategy isn't foolproof by any means, even in intra-party Democratic primaries.
—
Oren Oppenheim,
ABC News,
26 June 2026
Sundresses are also a foolproof staple for summer.
—
Clara McMahon,
PEOPLE,
26 June 2026
See All Example Sentences for foolproof
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John Romano,
The Orlando Sentinel,
29 June 2026
Two different kinds of potatoes and the foolproof combo of seasonings will see you through this recipe.
—
Patricia S York,
Southern Living,
27 June 2026
The strategy isn't foolproof by any means, even in intra-party Democratic primaries.
—
Oren Oppenheim,
ABC News,
26 June 2026
Sundresses are also a foolproof staple for summer.
—
Clara McMahon,
PEOPLE,
26 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 5 Jul. 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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