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
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
But neither strategy is foolproof.
—Nicholas Florko, The Atlantic, 11 Apr. 2026
See All Example Sentences for foolproof
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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
But neither strategy is foolproof.
—Nicholas Florko, The Atlantic, 11 Apr. 2026
See All Example Sentences for foolproof
Cite this Entry
“Foolproof.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/foolproof. Accessed 28 Apr. 2026.
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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