Bulletproof

Pronunciation

• IPA: /bÊŠl.ɪtpɹuːf/
• Hyphenation: bul + let + proof

Alternative forms

• bullet-proof

Origin

bullet + -proof

Full definition of bulletproof

Adjective

1. (of a material) Capable of withstanding a direct shot by a bullet fired from a gun.A bulletproof window.A bulletproof vest.
2. (idiomatic) reliable, infallible, sturdy or error-tolerant.
3. (usually of an idea or concept) Unbreakable, very tough.

Synonyms

• (infallible) foolproof

Verb

1. To make proof against bullets.
2. (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.