/ ˈtræktə(r); NAmE / noun
1.
a powerful vehicle with two large and two smaller wheels, used especially for pulling farm machinery
2.
( NAmE ) the front part of a tractor-trailer , where the driver sits
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WORD ORIGIN
late 18th cent. (in the general sense someone or something that pulls ): from Latin , from tract- pulled, from the verb trahere .