Okla. Stat. tit. 47, § 47-1-180: Trailer

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 so constructed that no part of its

weight rests upon the towing vehicle, provided however, the

definition of trailer herein shall not include implements of

husbandry as defined in Section 1-125 of this chapter.