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
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
There is still no foolproof way to know whether someone is lying about their age, but Meta is using AI to look for signals that a user may be under 18 and place those accounts into teen safety settings.
—Larry Magid, Mercury News, 30 Apr. 2026
The Antiaging Routine The first step to a summer glow-up is a foolproof skin care routine.
—Alanna Martine Kilkeary, Glamour, 27 Apr. 2026
See All Example Sentences for foolproof
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
There is still no foolproof way to know whether someone is lying about their age, but Meta is using AI to look for signals that a user may be under 18 and place those accounts into teen safety settings.
—Larry Magid, Mercury News, 30 Apr. 2026
The Antiaging Routine The first step to a summer glow-up is a foolproof skin care routine.
—Alanna Martine Kilkeary, Glamour, 27 Apr. 2026
See All Example Sentences for foolproof
Recent Examples of Synonyms for foolproof
Adjective
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Lewis recruit Jake Matise worked a perfect final 1 1/3 innings to earn the save for Mount Carmel (22-10, 10-4).—
Steve Millar,
Chicago Tribune,
14 May 2026
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His big hit improved the club to 21-6 overall and a perfect 11-0 in league play.—
John Maffei,
San Diego Union-Tribune,
14 May 2026
Adjective
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Mushrooms muscle in for beef in a potent faux Bolognese; the hefty hempseed burger, crispy without and juicy within, is too tall to fit your mouth; and every piece of lettuce is flawless.—
Ligaya Mishan,
New York Times,
11 May 2026
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Shanto played an almost flawless innings and raised his sixth test half-century off 90 balls with a single to mid-off off Afridi.—
ABC News,
ABC News,
11 May 2026
Adjective
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Even recognizing one or two reliable triggers—like tight clothing, prolonged sitting or hot weather—can help guide meaningful adjustments.—
Lauryn Higgins,
Flow Space,
11 May 2026
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The dogs provide rangers with a reliable way to etch trails, haul supplies and even assist park scientists with snow-dependent research.—
K. R. Callaway,
Scientific American,
11 May 2026
Cite this Entry
“Foolproof.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/foolproof. Accessed 18 May. 2026.
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