[swich-bak] 
| 1. | a highway, as in a mountainous area, having many hairpin curves. |
| 2. | Railroads. a zigzag track arrangement for climbing a steep grade. |
| 3. | British. roller coaster. |
| 4. | (of a road, railroad track, etc.) to progress through a series of hairpin curves; zigzag: The road switchbacks up the mountain. |
| switch·back (swĭch'bāk') n.
To proceed in sharp turns in alternating directions on a steep incline: the trail switchbacked up the mountain; the hikers switchbacked up the hill. |
