off-piste adjective 2adverb 1 adjective2 •Not specially prepared or designated for skiing, hence viewed as more exciting but also more dangerous.Please stay away from the off-piste slopes. •(figurative) Deviating from what is seen as correct, usual or conventional.His ideas are totally off-piste. adverb1 •In off-piste locations.We are skiing off-piste this morning.