From Longman Dictionary of Contemporary Englishtractortrac‧tor /ˈtræktə $ -ər/ ●○○ noun [countable] 
TATTRa strong vehicle with large wheels, used for pulling farm machinery
TATTRa strong vehicle with large wheels, used for pulling farm machineryExamples from the Corpus
tractor• That's about what you'd expect for a tractor of this size.• Carla Miller was widowed when a tractor rolled over on her husband.• It took two additional tractors to disinter the float and permit Hirt and Channing to go on with the show.• We had to have waders and tractors to go through the streets.• I left Don one morning, just after he came in off his tractor from the fields.• He opens a surfer shop in Ames, Iowa, right down the street from the tractor repair shop.• All the time the tractor is sinking Through the degrees, deepening Into its hell of ice.• Knocked from its invisible supporting cradle of needle-thin tractor beams, the effigy swayed.Origin tractor (1700-1800) Modern Latin Latin trahere “to pull” 