Search Dictionary
Definition of bulletproof

bulletproof

/ˈbʊl.ɪtˌpruːf/
bul · let · proof
Past Simple:bulletproofed
•
Past Participle:bulletproofed
•
Present Participle:bulletproofing
JUMP TO:

bulletproof Lexical Profile

bulletproof Game Scores & Validity

• adjective

1

Designed to resist the penetration of bullets or similar high-velocity projectiles.

Example

"The diplomatic vehicle was fitted with thick bulletproof glass for added security."

2

Safe from failure, error, or successful criticism; thoroughly sound and reliable.

Example

"The legal team spent weeks preparing a bulletproof contract before finalizing the merger."

Synonyms
View all synonyms for bulletproof
Antonyms
View all antonyms for bulletproof

• verb

1

To make a system, plan, or argument secure against failure, flaws, or attack.

Example

"The engineers worked overtime to bulletproof the software before the public launch."

2

To make a structure, vehicle, or garment resistant to bullets.

Example

"The security company was hired to bulletproof the windows of the courthouse."

Synonyms
View all synonyms for bulletproof
Antonyms
View all antonyms for bulletproof

• Nearby Words

bullet
bulletin
bulletlike
bulletproof
bulletproofing
bullfight
bullfighter

Usage Trend

Historical frequency of usage in published text.

180019102020
Data source: Google Books Ngram Viewer

Cite this Entry

Wordmom. (2026). Definition of Bulletproof. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/bulletproof
Built for writers, students, and competitive word game players, Wordmom combines an uncluttered English dictionary and thesaurus with fast, pattern-based word finders so you can verify definitions, synonyms, and high-scoring tile plays in one place.
Word Games & Solvers
Word FinderScrabble Word FinderWords With Friends CheatWordle SolverAnagram Solver
Dictionary & Reference
DictionarySynonymsAntonymsWords
Community
Contact UsEditorial PolicyPrivacy PolicyTerms and Conditions
© 2016–2026 Wordmom Network. All rights reserved. Made with for word lovers everywhere.
Disclaimer: SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A. and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro. Words With Friends® is a registered trademark of Zynga Inc. Wordle® is a registered trademark of The New York Times Company. Other referenced game titles and tournament lexicon codes (including NASPA NWL and WESPA/HarperCollins CSW) are trademarks of their respective owners. Wordmom is an independent reference utility for educational and entertainment purposes and is not affiliated with, sponsored by, or endorsed by Hasbro, Mattel, Spear, Zynga, The New York Times Company, NASPA, WESPA, or HarperCollins Publishers. All game names are referenced strictly under nominative fair use to indicate compatibility.