- a combination trucking unit consisting of a tractor hooked up to a full trailer or a semitrailer.
Compare rig(def 8).
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for tractor-trailer
In 2004, Afghan security forces stumbled on a cache of heroin hidden in tractor-trailer outside Kandahar.Karzai Family Secrets
September 27, 2009
Yes, just turning into the bridge approach, two tractor-trailer combos, preceded and followed by white cars.Take the Reason Prisoner
John Joseph McGuire