1. past tense of bulletproof; made resistant to or protected against bullets
Usage: transitive verb; commonly used in security and protective contexts
2. past tense of bulletproof; made resistant to criticism, failure, or attack; made foolproof or airtight
Usage: transitive verb; figurative use

Examples

• The president's limousine was bulletproofed for maximum security.
• The company bulletproofed its legal strategy before the trial.
• Engineers bulletproofed the building's windows with special glass.
• She bulletproofed her argument with extensive research and data.
• The new security protocol bulletproofed the system against hacking attempts.
• They bulletproofed the contract to prevent any loopholes.