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Definition of tractor-trailer noun from the Oxford Advanced Learner's Dictionary

picture of an articulated lorry

tractor-trailer

noun

tractor-trailer pronunciation English

tractor-trailer pronunciation American

(also trailer truck) (North American English)

a large lorry/truck with two sections, one in front where the driver sits and one behind for carrying goods. The sections are connected by a flexible joint so that the tractor-trailer can turn corners more easily.

see also articulated