Bulletproof meaning

bo͝ol'ĭt-pro͝of'
Impenetrable by bullets.
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Impervious to assault, damage, or failure; guaranteed.

A bulletproof method; bulletproof arguments.

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To make impenetrable by bullets.
verb
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That bullets cannot pierce.
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To make bulletproof.
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Extremely stable hardware or software that cannot be brought down no matter what conditions arise. See industrial strength.
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Impervious to bullets or other high velocity projectiles. On a personal note, when I worked for Continental Telephone Company (CONTEL) in the 1980s, the central office (CO) in Espanola, New Mexico, was a regular target for disgruntled customers or folks just out for a little target practice. (We never were 100 percent sure. Espanola was a pretty wild place.) The CO technicians regularly had to dig rifle slugs out of the analog step-by-step (SxS) CO switch. With relatively minor repairs, that old electromechanical switch could be restored to full operational status, which attests to the ruggedness of the technology.The CO wasn't bulletproof, but was close to it.When we installed a new, and much more sensitive, electronic common control (ECC) digital switch, we had to bulletproof the CO with an armored door. See also aramid.
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Impervious to attack. Totally secure, generally in reference to software that is impervious to attack from hackers, crackers, and other miscreants. Interestingly, however, Microsoft defines bulletproof as [software] capable of overcoming hardware problems. (I suppose a definition is a matter of perspective to some extent.)
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(of a material) Capable of withstanding a direct shot by a bullet fired from a gun.

A bulletproof window.

A bulletproof vest.

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(idiomatic) Reliable, infallible, sturdy or error-tolerant.
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(usually of an idea or concept) Unbreakable, very tough.
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To make proof against bullets.
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(slang) To make resistant to failure.

We have to bulletproof this program before we let the users at it; check every input, catch every possible flaw...it must not fail in use.

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Origin of bulletproof

  • bullet +‎ -proof
    From Wiktionary