"trailer" in the noun sense
1. dawdler, drone, laggard, lagger, trailer, poke
someone who takes more time than necessary someone who lags behind
2. preview, prevue, trailer
an advertisement consisting of short scenes from a motion picture that will appear in the near future
a large transport conveyance designed to be pulled by a truck or tractor
4. trailer, house trailer
a wheeled vehicle that can be pulled by a car or truck and is equipped for occupancy
Source: WordNet® (An amazing lexical database of English)
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