• Webster's Revised Unabridged Dictionary
    • bullet-proof Capable of resisting the force of a bullet; resistant to penetration by a bullet; armored; as, a bulletproof vest; a bulletproof window.
    • bullet-proof designed so as to be resistant to abuse or misuse and incapable of malfunction under normal use; as, a bulletproof computer program.
    • bullet-proof so well thought out as to be resistant to criticism or certain to succeed; as, a bulletproof plan.
    • ***
Century Dictionary and Cyclopedia
  • Interesting fact: Bullet proof vests, fire escapes, windshield wipers and laser printers were all invented by women.
    • bullet-proof Capable of resisting the impact of a bullet.
    • ***
Chambers's Twentieth Century Dictionary
    • Bullet-proof proof against bullets
    • ***


Chambers's Twentieth Century Dictionary
Fr. boulet, dim. of boule, a ball—L. bulla. See Bull, an edict.


In literature:

The heart and other vital organs are covered with bullet-proof corsets, liver and lung pads and porous plasters.
"Peck's Sunshine Being a Collection of Articles Written for Peck's Sun, Milwaukee, Wis. - 1882" by George W. Peck
The gunboats began embarking all their ammunition and commenced putting up their extra bullet proof protecting shields.
"Khartoum Campaign, 1898" by Bennet Burleigh
At Presqu' Isle the twenty-seven soldiers went into the blockhouse of the fort and prepared to hold it, lining and making it bullet-proof.
"Heroes of the Middle West" by Mary Hartwell Catherwood
A hail of rifle-bullets fell upon her decks; but she stuck to her post, and succeeded in driving the enemy to the bomb-proofs.
"The Naval History of the United States" by Willis J. Abbot
That bullet-proof shield makes him as safe as if he were at home.
"The Boy Scout Automobilists" by Robert Maitland
It was bullet-proof, without windows, and two stories high.
"Ox-Team Days on the Oregon Trail" by Ezra Meeker
It was a bullet-proof smile and never wavered.
"Officer 666" by Barton W. Currie
I'd like to see him in a hot battle, if I were bullet proof myself.
"A Captain in the Ranks" by George Cary Eggleston
Our skins are no more bullet-proof than yours, and a woman's scalp is the same to an Indian as a man's.
"Boys' Book of Frontier Fighters" by Edwin L. Sabin
The sides are bullet-proof, and there ain't any danger of your getting hurt there.
"Through Apache Lands" by R. H. Jayne

In news:

ASSUMPTION PARISH, LA — A convicted felon is back behind bars in Assumption Parish for allegedly possessing a stolen firearm as well as a bullet proof vest.
Barbara Wise sits in her studio, where she produces everything from bullet-proof vests to hand-painted scarves.
Local artist Barbara Wise didn't have a master plan when she designed her first bullet-proof vest.
Barbara's interests, and her business, go far beyond bullet-proof vests.
Call for 'disturbance' leads Salem City Police to arrest brother, sister, confiscate bullet-proof vest, shotgun.
GOP donor wonders if Obama's 'teleprompters are bullet-proof '.
"The bottom line is that bullet proof vests save cops' lives and it is worth every penny of federal help to make sure cops on the beat have access to the very best equipment we have to offer," US Sen Charles Schumer, D-New York said.
On Monday night there was plenty attention being paid to the specially designed, bullet-proof vest Dallas Cowboys quarterback Tony Romo wore to protect his broken rib against the Washington Redskins.
Well, Romo wasn't the only one donning bullet-proof protection.
Bullet proof glass CEO lets employee fire on him bulletproof .
The owner was in the process of making upgrades to their security system, adding surveillance cameras , bullet proof glass at the register, and were just waiting for a door to be installed.
Birria, bullet-proof tortillas and mariachi.
Bullet proof performance amidst challenging production environments.
MT @MVPHealthCare: Protect your family from #lead poisoning ME-I thought you would suggest a bullet proof vest.
Brick Rotary Bullet Proof Vest Fundraiser.

In science:

Proof This is a consequence of the Hu-Liu bullet identity.
Generalizations of Jordan Algebras and Malcev Algebras
The third bullet in the definition of the partition (see the first paragraph in the proof of Theorem 2.1) forces that R[µ(q) ,∞) x2 d em = 0.
Central limit theorem for a many-server queue with random service rates
This seems to be a proof of the need of dark matter since, being collisionless, it continues to be located around the bullet, contrary to the baryonic gas.
Tests of General Relativity on Astrophysical Scales
To prove the second bulleted claim in the proof of Theorem 5.1, we first analyze the topology of W a bit further (the first bulleted claim will come out along the way).
Knotted surfaces in 4-manifolds
The weak lensing observation of bullet cluster indicates the separation of baryonic mass component and unseen matter induced by the merger, which provided a direct empirical proof of the existence of DM.
Dark Matter Annihilation Induced Gamma Ray Emission from Galaxy Cluster 1E0657-56