1
- a long or roundabout route that is taken to avoid something or to visit somewhere along the way迂回路, 绕行的路：
he had made a detour to a cafe.
他绕道来到了一家咖啡馆。
1.1
- an alternative route for use by traffic when the usual road is temporarily closed（常用道路暂时封闭时的）临时绕行道路。
no obj., with adverbial of direction
1- take a long or roundabout route绕道：
he detoured around the walls.
他沿墙绕道而行。
1.1
- with obj. avoid or bypass (something) by taking such a route绕过, 绕开…而行：
I would detour the endless stream of motor homes.
我要绕过川流不息的度假房车。
词源
mid 18th cent. (as a noun)： from French détour 'change of direction'， from détourner 'turn away'.