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
In a warming world, trees are one of the most foolproof defenses — taking greenhouse gases out of the atmosphere and providing shade that can lower air conditioning bills.
—
Orlando Sentinel Editorial Board, The Orlando Sentinel, 25 Apr. 2026
How To Get Rid Of Voles Unfortunately, there’s no easy, foolproof way to get rid of voles.
—Arricca Elin Sansone, Southern Living, 19 Apr. 2026
The plan doesn’t seem so foolproof to me anyway.
—R. Eric Thomas, Chicago Tribune, 15 Apr. 2026
Maritime tracking isn't foolproof, as ships can spoof or manipulate tracking systems to obscure their origin, destination and cargo.
—Steve Beynon, ABC News, 13 Apr. 2026
See All Example Sentences for foolproof
Orlando Sentinel Editorial Board, The Orlando Sentinel, 25 Apr. 2026
How To Get Rid Of Voles Unfortunately, there’s no easy, foolproof way to get rid of voles.
—Arricca Elin Sansone, Southern Living, 19 Apr. 2026
The plan doesn’t seem so foolproof to me anyway.
—R. Eric Thomas, Chicago Tribune, 15 Apr. 2026
Maritime tracking isn't foolproof, as ships can spoof or manipulate tracking systems to obscure their origin, destination and cargo.
—Steve Beynon, ABC News, 13 Apr. 2026
See All Example Sentences for foolproof
Recent Examples of Synonyms for foolproof
Adjective
-
Premium Back Massager Practical, sleek, and top of the line, this back massager is perfect for at-home spa days.—
Maeve Dunigan,
New Yorker,
7 May 2026
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The conditions were perfect for airlines to raise fares – bad news for bargain-seeking travelers.—
Chris Isidore,
CNN Money,
6 May 2026
Adjective
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Students are turning in flawless essays and problem sets, yet many can’t explain their work, a troubling sign that generative AI is replacing actual learning in higher education.—
Jocelyn Gecker,
Los Angeles Times,
28 Apr. 2026
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Foundations that once gave them a flawless base are settling into fine lines.—
Annie Blay-Tettey,
Allure,
27 Apr. 2026
Adjective
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Name what works, define one agreement, and build from something that feels stable and reliable.—
Tarot.com,
Hartford Courant,
5 May 2026
-
As markets continue to adjust, gold coins are expected to maintain their position as a reliable store of value.—
Ascend Agency,
New York Daily News,
4 May 2026
Cite this Entry
“Foolproof.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/foolproof. Accessed 10 May. 2026.
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