Off-road Definition

ôfrōd, ŏf-
adjective
Designed for use, occurring, done, etc. off public roads, esp. on a route or course having rough terrain.
And off-road vehicle, off-road racing.
Webster's New World

Alternative spelling of off-road.

Wiktionary
adverb
On a route or course that is not a public road, esp. one having rough terrain.
Webster's New World
verb
(intransitive) To travel in rugged terrain not on a paved track.
Wiktionary