Bulletproof
/ˈbʊlɪtˌpruːf/
Definitions
2 meaningsImpervious to bullets; capable of withstanding gunfire.
/ˈbʊlɪtˌpruːf/
Resistant to bullets.
The car's bulletproof windows protected the passengers.
💡 Simply: Cannot be pierced by bullets.
More Examples
He wore a bulletproof vest under his shirt.
How It's Used
"The soldiers wore bulletproof vests during the patrol."
"The police car was equipped with bulletproof windows."
Completely secure; immune to criticism or failure.
/ˈbʊlɪtˌpruːf/
Figuratively, extremely effective or resistant to failure.
Her alibi was bulletproof.
💡 Simply: Very strong and reliable.
More Examples
The software is designed to be bulletproof against viruses.
How It's Used
"Their business plan seemed bulletproof."
"His argument was bulletproof; no one could refute it."
From "bullet" + "proof", meaning resistant to bullets. The term emerged with the development of protective materials in the late 19th and early 20th centuries.
Initially used literally to describe materials protecting against bullets, its figurative use became more common in the 20th century.
Memory tip
Think of a bullet bouncing harmlessly off.