noun Someone who or something that trails (follows behind); something that is trailing.
noun Part of an object which extends some distance beyond the main body of the object.
the trailer of a plant
noun 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.
At the end of the day, we put the snowmobiles back on the trailer.
noun A furnished vehicle towed behind another, and used as a dwelling when stationary.
We drove our trailer to Yellowstone Park.
noun A prefabricated home that could be towed to a new destination but is typically permanently left in an area designated for such homes.
The young couple′s first home was in a trailer.
noun A preview of a film, video game or TV show.
The trailer for that movie makes it seem like it would be fun.
noun A short blank segment of film at the end of a reel, for convenient insertion of the film in a projector.
noun 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.