Longman Dictionary of Contemporary English
The Collaborative International Dictionary
bullet-proof \bul"let-proof`\, bulletproof \bul"let*proof`\, a.
Capable of resisting the force of a bullet; resistant to penetration by a bullet; armored; as, a bulletproof vest; a bulletproof window.
designed so as to be resistant to abuse or misuse and incapable of malfunction under normal use; as, a bulletproof computer program.
so well thought out as to be resistant to criticism or certain to succeed; as, a bulletproof plan.
Wiktionary
a. (alternative spelling of bulletproof English) (Capable of withstanding a direct shot, reliable, or unbreakable).
Usage examples of "bullet-proof".
Bill Brakey, ensconced behind bullet-proof doors, made certain that The Kid was alone, and that there was no trap laid by police or gangster enemies before he opened the door.
Staging Area Fagin was standing under a high arc light and watching his marshals suiting up Banish in a BDU, a battle dress uniform, black fatigues and a flak jacket and bullet-proof helmet.
Dortmunder bounced into the bullet-proof clear plastic shield that takes up most of the legroom in the backseat of a New York City cab, then stayed there, hands, nose, lips and eyebrows pasted to the plastic as he looked through at this cabbie from Planet X, who, when finished ricocheting off his steering wheel, reached under his seat and came up with a shiny silver-and-black Glock machine pistol!
They went up the steps of the engawa, through the door guarded by two officers wearing riot helmets and bullet-proof vests and holding machine pistols.
You'll need a bullet-proof vest,' murmured Bob as he ushered Georgie into a ring full of shepherdesses, gypsies, clowns and pop stars.
This bank had beefed up its security after the first two robberies, now the tellers were locked behind a bullet-proof enclosure.