bulletproof
adjective
1. without flaws or loopholes
- a bulletproof argument
Similar word(s): incontestable, incontestible, unassailable, unshakable, watertight
2. not penetrable by bullets
- bulletproof glass
- bulletproof vest
Similar word(s): armored, armoured
Sentences with bulletproof as an adjective:
- A bulletproof window.
- A bulletproof vest.