Definition of: tractor

(trak′tər) noun
1. A machine or instrument for pulling or drawing.
2. A powerful, motor–driven vehicle, usually having heavy treads, used, as on farms, to draw a plow, reaper, etc.
3. An automotive vehicle with a driver's cab, used to haul trailers, etc.
4. A traction engine.
5. Aeron. a An airplane with the propeller or propellers situated in front of the supporting surface to pull it through the air: also tractor airplane. b The propeller of a tractor airplane. [<NL <L tractus. See TRACE¹.]