bull bar noun1 •(Australia, New-Zealand) A welded framework of metal bars at a vehicle's front, designed to protect it during collisions with animals, but often purchased as a fashion accessory.I got the job of buying the after-market products, such as the bull bar and tow bar, so Ruth and I set out for ARB, the 4X4 shop at Caboolture. — 2010 formsbull bars