1. Without flaws or loopholes
   "a bulletproof argument"
   - unassailable, unshakable, watertight, unshakeable 
2. Not penetrable by bullets
   "bulletproof glass"; "bulletproof vest"

1. Make bulletproof
   "bulletproof the car"

Derived forms: bulletproofed, bulletproofing, bulletproofs

See also: armored [US], armoured [Brit, Cdn], incontestable, incontestible

Type of: proof

Encyclopedia: Bulletproof

• breather
• breathing
• breathing apparatus
• breathing device
• breathing in
• breathing machine
• breathing out
• breathing place
• breathing room
• breathing space
• breathing spell
• breathing time
• breathless
• breathlessly
• breathlessness
• breathtaking
• breathtakingly
• breathy
• breccia
• brecciate
• Brecht
• brede
• breech
• breech birth
• breech closer