a combination trucking unit consisting of a tractor hooked up to a full trailer or a semitrailer.

Compare rig(def 8).
Also called semitrailer, semitruck. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for tractor-trailer

Contemporary Examples of tractor-trailer

  • In 2004, Afghan security forces stumbled on a cache of heroin hidden in tractor-trailer outside Kandahar.

    The Daily Beast logo
    Karzai Family Secrets

    Gerald Posner

    September 27, 2009

Historical Examples of tractor-trailer

  • Yes, just turning into the bridge approach, two tractor-trailer combos, preceded and followed by white cars.

    Take the Reason Prisoner

    John Joseph McGuire