Definition of bulletproof:
		
            
            
              
                "A bulletproof window."
              
            
          
            
            
            
          
            
              °To make proof against bullets.
            
            
            
          
            
              °(slang) to make resistant to failure.
            
            
            
              
                "We have to bulletproof this program before we let the users at it; check every input, catch every possible flaw...it must not fail in use."
              
	 
 
 
	
		
		
		Definition of bulletproof:
		
            
            
              
                "A bulletproof window."
              
            
          
            
            
            
          
            
              °To make proof against bullets.
            
            
            
          
            
              °(slang) to make resistant to failure.
            
            
            
              
                "We have to bulletproof this program before we let the users at it; check every input, catch every possible flaw...it must not fail in use."