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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Julian Champagnie took over Harrison Barnes’ starting spot in San Antonio and has been an athletic upgrade who is durable and reliable while providing accurate volume shooting.—
Law Murray,
New York Times,
18 May 2026
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Each of these shifts depend on market data that is reliable, licensed and machine-readable in ways legacy infrastructure was not built to deliver.—
Mike Cahill,
Forbes.com,
18 May 2026
Cite this Entry
“Foolproof.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/foolproof. Accessed 19 May. 2026.
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