Trailer Law and Legal Definition
A trailer can be a large transport vehicle designed to be hauled by a truck or tractor or it can be a furnished vehicle drawn by a truck or automobile and used when parked as a dwelling or office.
Example of a State Statute (South Carolina) defining trailer
According to S.C. Code Ann. § 56-3-20, Trailer means every vehicle with or without motive power, other than a pole trailer, designed for carrying persons or property and for being drawn by a motor vehicle and constructed so that no part of its weight rests upon the towing vehicle. A "Pole trailer" means every vehicle without motive power designed to be drawn by another vehicle and attached to the towing vehicle by means of a reach or pole or by being boomed or otherwise secured to the towing vehicle and ordinarily used for transporting long or irregularly shaped loads such as poles, pipes, or structural members capable, generally, of sustaining themselves as beams between the supporting connections.
According to S.C. Code Ann. § 58-23-10, "trailer" means a vehicle equipped to carry a load and which is attached to and drawn by a motor vehicle and trailers shall be classed as motor vehicles and subject to the provisions of Articles 1 to 11 of this chapter.