Bulletproof

//ˈbʊl.ɪtpɹuːf// adj, noun, verb, slang

adj, noun, verb, slang ·Moderate ·High school level

Definitions

Noun
  1. 1
    A liquor store slang

    "I converted it to a mini-bar and then I went to every single bulletproof in my neighborhood and ordered a ridiculous amount."

Verb
  1. 1
    To make proof against bullets. transitive
  2. 2
    make bulletproof wordnet
  3. 3
    To make resistant to failure. informal, transitive

    "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."

Adjective
  1. 1
    Capable of withstanding a direct shot by a bullet fired from a gun.

    "bulletproof window"

  2. 2
    Reliable, infallible, sturdy or error-tolerant. figuratively

    "bulletproof hosting"

Adjective
  1. 1
    not penetrable by bullets wordnet
  2. 2
    without flaws or loopholes wordnet

Synonyms

All synonyms
airtightarmoredcast ironcast ironfireproofflameproof

Example

More examples

"The police officer wore a bulletproof vest."

Etymology

From bullet + -proof.

Related phrases

bulletproof coffeebulletproof hostbulletproof hostingbulletproof vest

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.