I. noun Date: 1863 a zigzag road, trail, or section of railroad tracks for climbing a steep hill, ~ adjective II. intransitive verb Date: 1903 to follow a zigzag course especially for ascent or descent
SWITCHBACK
Meaning of SWITCHBACK in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012