foolproof

adjective

fool·​proof ˈfül-ˌprüf How to pronounce foolproof (audio)
: 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
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.
Taking a look at your user manual is the most foolproof way to find out how your microwave ticks, but all is not lost even if your manual is. Audrey Bruno, SELF, 14 Oct. 2024 Worcestershire, dry mustard, and ground red pepper combine with your go-to cheese, for a foolproof party snack. Krissy Tiglias, Southern Living, 22 Sep. 2024 Conclusion These recommendations are not foolproof solutions that will prevent every issue, such as a blue screen caused by a necessary system update. Stoyan Mitov, Forbes, 20 Sep. 2024 That’s why leaning on the opinions of fellow shoppers is an almost foolproof way of discovering products that actually work. Maya Gandara, StyleCaster, 4 Sep. 2024 See all Example Sentences for foolproof 

Word History

First Known Use

1874, in the meaning defined above

Time Traveler
The first known use of foolproof was in 1874

Dictionary Entries Near foolproof

Cite this Entry

“Foolproof.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/foolproof. Accessed 10 Dec. 2024.

Kids Definition

foolproof

adjective
fool·​proof ˈfül-ˈprüf How to pronounce foolproof (audio)
: done, made, or planned so well that nothing can go wrong
foolproof directions

More from Merriam-Webster on foolproof

Last Updated: - Updated example sentences
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