[boo l-it-proof]


(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.

Origin of bulletproof

First recorded in 1855–60; bullet + -proof
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for bulletproof



not penetrable by bulletsbulletproof glass


(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