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
That means the Cubs will need strong pitching to go with their foolproof defense and some speed on offense to scratch out runs on cold-weather days.
—
Paul Sullivan, Chicago Tribune, 26 Mar. 2026
Here’s how to style drawstring jeans for spring and beyond in five foolproof outfit ideas.
—India Roby, Glamour, 18 Mar. 2026
Make things simpler by building your wardrobe around a few foolproof hero pieces.
—Amanda Le, InStyle, 14 Mar. 2026
Rotisserie chicken, peas, and herbs come together for this foolproof one-pot meal.
—Symiah Dorsey, Southern Living, 14 Mar. 2026
See All Example Sentences for foolproof
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Paul Sullivan, Chicago Tribune, 26 Mar. 2026
Here’s how to style drawstring jeans for spring and beyond in five foolproof outfit ideas.
—India Roby, Glamour, 18 Mar. 2026
Make things simpler by building your wardrobe around a few foolproof hero pieces.
—Amanda Le, InStyle, 14 Mar. 2026
Rotisserie chicken, peas, and herbs come together for this foolproof one-pot meal.
—Symiah Dorsey, Southern Living, 14 Mar. 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 3 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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