Miss. Code Ann. § 63-3-107: Miss. Code Ann. § 63-3-107

(a) “Trailer” means every vehicle without motive power designed for carrying persons or property and for being drawn by a motor vehicle and so constructed that no part of its weight rests upon the towing vehicle.

(b) “Semitrailer” means every vehicle without motive power designed for carrying persons or property and for being drawn by a motor vehicle and so constructed that some part of its weight and that of its load rests upon or is carried by another vehicle.