1 a type of container with wheels that is pulled by vehicle 拖车: a car towing a trailer with a boat on it 拖车里装着一条小船，由一辆汽车拖着

2 (US 美) =CARAVAN(1)

3 (especially Brit 尤为英) a series of short pieces taken from a film and used to advertise it （电影的）预告片 ☞Look at clip. 参看clip。