SWITCHBACK
- A 180░ bend in a road or path, esp. one leading up the side of a mountain
- A road, path, or railroad with alternate sharp ascents and descents
- A roller coaster
- a zigzag mountain railway on which the train shunted back at each stage [n -S] / to follow a zigzag course esp for ascent or descent [v SWITCHBACKED, SWITCHBACKING, SWITCHBACKS]