bulletproof

Word parts

bullet + -proof

Pronunciation

• IPA ^(key): /bʊl.ɪtpruːf/

• Audio (AU)

  (file)

• Hyphenation: bul‧let‧proof

Adjective

Positive bulletproof

Comparative more bulletproof

Superlative most bulletproof

Testing a bulletproof vest 1923

1. A bulletproof material is something that can resist a direct shot by a bullet fired from a gun.

   The police officers are wearing bulletproof vests.

2. If an idea or concept is bulletproof, it is unbreakable, very tough.

Verb

Plain form bulletproof

Third-person singular bulletproofs

Past tense bulletproofed

Past participle bulletproofed

Present participle bulletproofing

1. (transitive) If you bulletproof something, you make it able to resist bullets.

   The engineers are trying to bulletproof the president's vehicle now.

2. (transitive) (slang) If you bulletproof something, you make it 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.