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

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