Trailer Definition

A cart, wagon, or large van, designed to be pulled by an automobile, truck, or tractor, for hauling freight, animals, a boat, etc.

To pull or tow (a boat, car, etc.) by using a trailer.

To travel by using a trailer.

Also known as the tail or trace portion of the data set. The portion of a data block, cell, frame, or packet that succeeds the text field and contains information relative to message analysis, including message tracking and diagnostics. The trailer often includes an error detection and correction mechanism to manage the integrity of the transmitted data. See also block, cell, data format (illustration), frame, header, packet, and text field.