a, o, e, l, c, r, t, i are letters that make 'tractor trailer'
ER, OR, tractor, trail, trailer, tract, act, ail, AC, rail, il, AI, CT, ai, RA, IL, tor, Ler, Ra, actor, LE, Ac, Er are words within 'tractor trailer'
1 possible definitions for 'tractor trailer'
Under this definition, tractor trailer is a noun and has the following properties:
semi, trailer truck, trucking rig, articulated lorry, rig have the same meaning as 'tractor trailer'
'tractor trailer' can be a type of truck, motortruck.
tandem trailer is a type of tractor trailer.
semitrailer, semi, trailer are parts of 'tractor trailer'.