bul·​let·​proof | \ ˈbu̇-lət-ˌprüf How to pronounce bulletproof (audio) also ˈbə- \

Definition of bulletproof

1 : impenetrable to bullets bulletproof glass
2 : not subject to correction, alteration, or modification a bulletproof argument

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Examples of bulletproof in a Sentence

The car has bulletproof windows. The police officer was wearing a bulletproof vest.
Recent Examples on the Web One tank held more than 600 gallons of water, the other held more than 450, and they were protected by glass that was supposedly bulletproof. Steve Gardner, USA TODAY, "Marlins Park no longer has fish tanks behind home plate," 18 Mar. 2021 The protection offered by vaccines doesn’t need to be bulletproof to have an effect. Katherine J. Wu, The Atlantic, "The Virus Is Evolving. But So Are Your Antibodies," 12 Feb. 2021 The demand extends down to tactical gear, such as bulletproof vests. William Thornton | Wthornton@al.com, al, "Alabamians stocking up on ammunition, prepping for post-election unrest," 22 Oct. 2020 Twin boys who led a militia in Myanmar were thought to be magically bulletproof. Lauren Katzenberg, New York Times, "Turning the Lights Down on the At War Channel," 16 Oct. 2020 Fox posted a review for the vest, as well as posted a photo to Facebook of her grandson posing in the non-bulletproof vest. Fox News, "Portland protester outed by his own grandmother after she identified him as alleged 'bomber' seen in videos: report," 2 Aug. 2020 Of President Bush throwing a strike down the middle for the first pitch in Yankee Stadium in a bulletproof vest. Anonymous Mlb Player, Detroit Free Press, "MLB player makes plea for 2020 season: Let us play for the common good," 6 June 2020 East Asian women face a ceiling that appears to be made of bulletproof glass. The Economist, "Go north, young woman," 7 Mar. 2020 Much of that work has focused on fortifying campuses, adding panic buttons and bulletproof glass, and hiring more officers in schools. Tyler Kingkade, NBC News, "School tip lines were meant to stop shootings, but uncovered a teen suicide crisis," 1 Feb. 2020

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

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First Known Use of bulletproof

1693, in the meaning defined at sense 1

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Time Traveler for bulletproof

Time Traveler

The first known use of bulletproof was in 1693

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Statistics for bulletproof

Last Updated

1 Apr 2021

Cite this Entry

“Bulletproof.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/bulletproof. Accessed 12 Apr. 2021.

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More Definitions for bulletproof



English Language Learners Definition of bulletproof

: made to stop bullets from going through


bul·​let·​proof | \ ˈbu̇-lət-ˌprüf How to pronounce bulletproof (audio) \

Kids Definition of bulletproof

: made to stop bullets from going through

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Comments on bulletproof

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