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[boo l-it-proof] /ˈbʊl ɪtˌpruf/
(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.
1855-60; bullet + -proof Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for bulletproof
  • The thing felt pretty bulletproof during my short test-drive.
  • The site itself is a beautiful tribute, right down to the bulletproof red plastic case.
  • The suggestions of changing common practices is to improve the data itself, and make it more bulletproof.
  • His bulletproof vest stopped the bullets, and he was not injured.
  • Those who survived took to the streets in protest, demanding better weapons and bulletproof vests.
  • The recipe is simple and bulletproof for anyone with a rimmed baking sheet and an oven.
  • Western security contractors were known to frequent the store, sometimes wearing bulletproof vests.
  • The snow was bulletproof, the sky gray and our faces hidden behind scarves.
  • Unfortunately, there is no such thing as bulletproof armor.
British Dictionary definitions for bulletproof


not penetrable by bullets: bulletproof glass
(transitive) 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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bulletproof in Technology

Used of an algorithm or implementation considered extremely robust; lossage-resistant; capable of correctly recovering from any imaginable exception condition - a rare and valued quality. Synonym armor-plated.
[Jargon File]

The Free On-line Dictionary of Computing, © Denis Howe 2010
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