Dictionary
trac•tor-trail•er
Pronunciation: (trak'tur-trā'lur), [key]—
n.
a combination trucking unit consisting of a tractor hooked up to a full trailer or a semitrailer. Also called
semitrailer, semitruck. Cf.
rig1 (def. 10).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.