pile driver noun 2adjective 1forms 1 noun2 •A machine for forcing a pile, a long beam, into the ground as part of the construction of a foundation; usually by raising a weight and then dropping it on the beam. •(figurative) A person or thing who hits or attacks forcefully or powerfully.She scored a goal with a pile driver from the edge of the penalty box adjective1 •(figurative) Forceful.The champ ended the boxing match with a pile driver blow to his opponent’s jaw. formspile drivers