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.
Related Words
Relevance
Dissimilar Words
Example Sentences
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Recent Examples of foolproof
No method is completely foolproof, so avoiding contaminated water remains the safest strategy.
—
Ryan Brennan, Kansas City Star, 16 June 2026
Jumpsuits are one of the most foolproof ways to pull together an outfit with minimal effort.
—Sophie Dodd, Travel + Leisure, 12 June 2026
Fortunately, Mike, AKA the Avocado Whisperer, has a foolproof plan to ensure top-top avocados.
—Matt Reigle Outkick, FOXNews.com, 10 June 2026
There are no foolproof safety guarantees, but parents should prioritize investing time in some sort of hands-on driving course.
—Doug Turnbull, AJC.com, 7 June 2026
See All Example Sentences for foolproof
Ryan Brennan, Kansas City Star, 16 June 2026
Jumpsuits are one of the most foolproof ways to pull together an outfit with minimal effort.
—Sophie Dodd, Travel + Leisure, 12 June 2026
Fortunately, Mike, AKA the Avocado Whisperer, has a foolproof plan to ensure top-top avocados.
—Matt Reigle Outkick, FOXNews.com, 10 June 2026
There are no foolproof safety guarantees, but parents should prioritize investing time in some sort of hands-on driving course.
—Doug Turnbull, AJC.com, 7 June 2026
See All Example Sentences for foolproof
Recent Examples of Synonyms for foolproof
Adjective
-
The Sparks were nearly perfect in the first quarter before committing their first turnover with under five minutes to play.—
Jordan Puente,
Los Angeles Times,
18 June 2026
-
The presidential suite has ergonomic desks and chairs (perfect for a working vacation) and brown leather details that give a cozy feel, plus floor-to-ceiling windows with unparalleled, unobstructed views of the city.—
Condé Nast,
Condé Nast Traveler,
17 June 2026
Adjective
-
Russell’s flawless but natural-looking glam convinced me that Ilia’s Skin Rewind Complexion Stick is the product my everyday makeup routine is missing.—
Kaelin Dodge,
InStyle,
16 June 2026
-
The brain is an extraordinarily complex biological system, and the circuitry responsible for silencing the body during sleep wasn’t optimized for flawless execution.—
Scott Travers,
Forbes.com,
14 June 2026
Adjective
-
But the systems are only as reliable as their sources, and are prone to misinformation and manipulation.—
Brian Stelter,
CNN Money,
23 June 2026
-
Amodei predicts that, over the next five to ten years, AI will achieve, among other things, the reliable prevention and treatment of nearly all natural infectious disease, the elimination of most cancer, the prevention of Alzheimer’s and a doubling of the human lifespan.—
Rob Toews,
Forbes.com,
22 June 2026
Cite this Entry
“Foolproof.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/foolproof. Accessed 23 Jun. 2026.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
