Definition of "bulletproofed" []

• Simple past tense and past participle of bulletproof. (verb)

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• "Colt Defense LLC, assured me during my visit and firing session at Colt headquarters last month that the Articulating Link Piston operating system has been "bulletproofed" (my word) and is totally reliable under adverse conditions and high round count."
• "Mr. Boudou's assertion that Argentina has bulletproofed its economy was vehemently attacked by economists for both of Mrs. Kirchner's chief primary rivals: Ricardo Alfonsín of the Radical Party and Eduardo Duhalde of a rival Peronist faction."
• "Soldiers found four rifles, two pistols and about 1,000 rounds of ammunition at the scene and a bulletproofed vehicle."