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
The available detectors are not foolproof.
—
Rose Horowitch, The Atlantic, 12 May 2026
Our simplified recipe is practically foolproof and has earned rave reviews.
—Kaitlyn Yarborough, Southern Living, 11 May 2026
While some might think signing Bauer might be a risky move for an MLB organization, Bauer feels his plan is foolproof in that regard.
—Los Angeles Times, 8 May 2026
Roasting is the foolproof technique to cooking a thick fillet of salmon.
—Ashlyn Ware, Midwest Living, 1 May 2026
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Rose Horowitch, The Atlantic, 12 May 2026
Our simplified recipe is practically foolproof and has earned rave reviews.
—Kaitlyn Yarborough, Southern Living, 11 May 2026
While some might think signing Bauer might be a risky move for an MLB organization, Bauer feels his plan is foolproof in that regard.
—Los Angeles Times, 8 May 2026
Roasting is the foolproof technique to cooking a thick fillet of salmon.
—Ashlyn Ware, Midwest Living, 1 May 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 16 May. 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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