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
Benefit Cosmetics Benefit Cosmetics Hoola Wave Bronzing Balm $36
Benefit Cosmetics
$36
Sephora
Matte, velvety, and buildable, the Hoola Wave Bronzing Balm pays homage to the original while offering up an innovative, foolproof formula for those who prefer creams over powders.
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Sophia Panych, Allure, 1 Apr. 2025
Google says this feature (previously available as a limited beta) is not foolproof, as scammers often change up their tactics.
—Ars Technica, 4 Mar. 2025
For measles vaccine, two is better than one Few vaccines, including the measles vaccine, are absolutely foolproof.
—Michelle Deal-Zimmerman, Baltimore Sun, 27 Feb. 2025
While no security measure is completely foolproof, combining these practices can significantly reduce the risk of falling victim to infostealer malware.
—Kurt Knutsson, Cyberguy Report, Fox News, 26 Feb. 2025
See All Example Sentences for foolproof
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Sophia Panych, Allure, 1 Apr. 2025
Google says this feature (previously available as a limited beta) is not foolproof, as scammers often change up their tactics.
—Ars Technica, 4 Mar. 2025
For measles vaccine, two is better than one Few vaccines, including the measles vaccine, are absolutely foolproof.
—Michelle Deal-Zimmerman, Baltimore Sun, 27 Feb. 2025
While no security measure is completely foolproof, combining these practices can significantly reduce the risk of falling victim to infostealer malware.
—Kurt Knutsson, Cyberguy Report, Fox News, 26 Feb. 2025
See All Example Sentences for foolproof
Cite this Entry
“Foolproof.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/foolproof. Accessed 22 Apr. 2025.
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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