trailer

noun

1.
someone who takes more time than necessary; someone who lags behind
Derived from:
trail
2.
an advertisement consisting of short scenes from a motion picture that will appear in the near future
3.
a large transport conveyance designed to be pulled by a truck or tractor
Derived from:
trail
4.
a wheeled vehicle that can be pulled by a car or truck and is equipped for occupancy
Derived from:
trail