off-road

adjective

1. designed, built, or used for traveling off public roads, especially on unpaved roads, trails, beaches, or rough terrain: an off-road vehicle.
2. taking place on such roads or terrain: off-road racing.
3. used for or suitable to an off-road vehicle: off-road tires.

adverb

4. on a road or terrain other than a public road: to travel off-road.

adjective

1. (of a motor vehicle) designed or built for use away from public roads, esp on rough terrain

adj.1949, from off (adv.) + road.