trailer in WordNet English dictionary

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