As used in this chapter, the following terms shall have the meanings indicated:
Any mechanically propelled vehicle used for pleasure or recreational purposes, running on rubber tires, belts, cleats, tracks, skis or cushion or air and dependent on the ground or surface for travel or other unimproved terrain, whether covered by ice or snow or not, where the operator sits in or on the vehicle. ("Operate" and all its moods and tenses when it refers to an "OHRV" means to use the vehicle in any manner for transportation.)