V8 /ˌviːˈeɪt/ noun2 •An internal combustion engine with eight cylinders arranged in two banks of four in a V-shaped configuration, usually as part of a single engine block.He spent extra for a V8 because he doubted that a straight-six would be enough for towing his trailer. •A vehicle with such an engine.He rolled up in a brand-new V8. formsV8s