n. Someone who or something that trails.n. An unpowered wheeled vehicle, not a caravan or camper, that is towed behind another, and used to carry equipment, etc, that cannot be carried in the leading vehicle.n. A furnished vehicle towed behind another, and used as a dwelling when stationary; a caravan; a camper.n. A prefabricated home that could be towed to a new destination, but typically is permanently left in an area designated for such homes.n. A preview of a film, video game or TV show.n. The final record of a list of data items, often identified by a key field with an otherwise invalid value that sorts last alphabetically (e.g., “ZZZZZ”) or numerically (“99999”); especially common in the context of punched cards, where the final card is called a trailer card.n. The last part of a packet, often containing a check sequence.v. To load on a trailer or to transport by trailer.