fool·​proof | \ ˈfül-ˌprüf How to pronounce foolproof (audio) \

Definition of foolproof

: 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 Their research shows that neither strategy is foolproof. Chloe Williams, The Atlantic, 20 June 2022 The pair work together on a nearly foolproof scheme, but when their success threatens to unravel, Winnie disappears again, leaving Ava to pick up the pieces. Serena Puang,, 19 June 2022 If that’s not a good indicator for a foolproof Mom gift, what is? Sarah Madaus, SELF, 15 Apr. 2022 The Heartstagram Frame by Framebridge is a foolproof gift that’s accessibly priced. Amanda Lauren, Forbes, 31 Jan. 2022 Even measuring profit margins, especially for particular goods, isn’t foolproof. New York Times, 3 June 2022 The strategy is not always foolproof, and some viruses might not pick up enough harmful mutations to be stopped. Andrew Joseph, STAT, 3 June 2022 School security experts say it’s important to have multilayered approaches to preventing school shooting deaths because no single approach is foolproof. Moriah Balingit, Washington Post, 29 May 2022 It’s that home-cook sensibility and her natural love of bold flavors that make her turkey recipe foolproof and far from bland. New York Times, 9 Nov. 2021 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'foolproof.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of foolproof

1874, in the meaning defined above

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The first known use of foolproof was in 1874

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Last Updated

1 Jul 2022

Cite this Entry

“Foolproof.” Dictionary, Merriam-Webster, Accessed 1 Jul. 2022.

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More Definitions for foolproof


fool·​proof | \ ˈfül-ˈprüf How to pronounce foolproof (audio) \

Kids Definition of foolproof

: done, made, or planned so well that nothing can go wrong a foolproof recipe

More from Merriam-Webster on foolproof

Thesaurus: All synonyms and antonyms for foolproof

Nglish: Translation of foolproof for Spanish Speakers


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