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
Prepping bean salad for the week is a foolproof way to keep nutritious meals on hand.
—
Olivia McIntosh, Martha Stewart, 19 May 2026
Worcestershire, dry mustard, and ground red pepper combine with your go-to cheese, for a foolproof party snack.
—Nellah Bailey McGough, Southern Living, 19 May 2026
Although there is no foolproof way to keep personal and financial data safe, people can take several steps to safeguard their information.
—Metro Creative Services, Boston Herald, 18 May 2026
Fencing is the only foolproof way to keep critters out.
—Donna Vickroy, Chicago Tribune, 14 May 2026
See All Example Sentences for foolproof
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Olivia McIntosh, Martha Stewart, 19 May 2026
Worcestershire, dry mustard, and ground red pepper combine with your go-to cheese, for a foolproof party snack.
—Nellah Bailey McGough, Southern Living, 19 May 2026
Although there is no foolproof way to keep personal and financial data safe, people can take several steps to safeguard their information.
—Metro Creative Services, Boston Herald, 18 May 2026
Fencing is the only foolproof way to keep critters out.
—Donna Vickroy, Chicago Tribune, 14 May 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 20 May. 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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