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bulletproof

[ bool-it-proof ]
/ ˈbʊl ɪtˌpruf /
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adjective
(of vehicles, glass, clothing, etc.) capable of resisting or absorbing the impact of a bullet.
Informal. safe from failure; without errors or shortcomings and beyond criticism: a bulletproof system; a bulletproof budget.
verb (used with object)
to make (something) bulletproof.
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Origin of bulletproof

First recorded in 1855–60; bullet + -proof
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

How to use bulletproof in a sentence

British Dictionary definitions for bulletproof

bulletproof
/ (ˈbʊlɪtˌpruːf) /

adjective
not penetrable by bulletsbulletproof glass
verb
(tr) to make bulletproof
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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