as in perfect
done, made, or planned so well that nothing can go wrong
a foolproof plan DNA fingerprinting gives police a virtually foolproof way to link a suspect to a crime scene.
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Recent Examples of foolproof
However, essential oils are best used as a preventative measure, not a foolproof solution against wasps, says Rick Young, owner of Youngs Pest Control.
—
Louise Parks,
Martha Stewart,
21 June 2026
Although computer spell-check is quite reliable, nothing is absolutely foolproof.
—
Jeanne Phillips,
Mercury News,
20 June 2026
This all sounds impressive enough, but even futuristic weapons like lasers are not foolproof on the battlefield.
—
Christopher McFadden,
Interesting Engineering,
20 June 2026
Matching sets are always a foolproof way to instantly put together, and this guest's coordinating pink denim proves the point.
—
Amanda Le,
InStyle,
20 June 2026
See All Example Sentences for foolproof
Louise Parks,
Martha Stewart,
21 June 2026
Although computer spell-check is quite reliable, nothing is absolutely foolproof.
—
Jeanne Phillips,
Mercury News,
20 June 2026
This all sounds impressive enough, but even futuristic weapons like lasers are not foolproof on the battlefield.
—
Christopher McFadden,
Interesting Engineering,
20 June 2026
Matching sets are always a foolproof way to instantly put together, and this guest's coordinating pink denim proves the point.
—
Amanda Le,
InStyle,
20 June 2026
See All Example Sentences for foolproof
Recent Examples of Synonyms for foolproof
Adjective
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Mexico enters a must-win World Cup knockout against Ecuador at Azteca after a perfect group stage, three clean sheets and record-shattering crowds.
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Diop found separation behind all-world defender Virgil van Dijk and headed Chemsdine Talbi's perfect cross into the goal.
Adjective
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Because autonomous agents execute end-to-end business logic, deployment requires a flawless blend of operational domain expertise (business) and systemic oversight (IT).
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The fluffy brush made with vegan bristles is angled for flawless foundation application.
Adjective
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But the systems are only as reliable as their sources, and are prone to misinformation and manipulation.
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Amodei predicts that, over the next five to ten years, AI will achieve, among other things, the reliable prevention and treatment of nearly all natural infectious disease, the elimination of most cancer, the prevention of Alzheimer’s and a doubling of the human lifespan.
Cite this Entry
“Foolproof.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/foolproof. Accessed 2 Jul. 2026.
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