big rig
noun
plural big rigs
US
: a large truck with an attached trailer that is used for hauling freight : semitrailer sense 2
A father and grandfather, Brubaker worked behind the wheel of a big rig for over a decade before transferring to a supervisory role.—Deirdre Reilly
He formerly drove a big rig for a freight company.—Jim Kleinpeter
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Merriam-Webster unabridged
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