<p><strong>Noun</strong></p><ul><li>a powerful motor-driven vehicle with large, heavy treads, used for pulling farm machinery, other vehicles, etc. Also called truck tractor.</li><li>a short truck with a driver's cab but no body, designed for hauling a trailer or semitrailer.</li><li>something used for drawing or pulling.</li><li>Aeronautics: a propeller mounted at the front of an airplane, thus exerting a pull. Also called tractor airplane.</li><li>an airplane with a propeller so mounted.</li></ul>