“one day when I was walking down the street,she came out.”中when引导的是定语从句吗还是状语从句?

问题描述:

“one day when I was walking down the street,she came out.”中when引导的是定语从句吗还是状语从句?
前面是翻译成“一天,当我沿着街道行走时……”还是“我沿着街道行走的那一天”?

是状语从句.定语从句的是修饰名词的one day 不是可以当名词么?可以,但是定语从句的名词是比较特殊的,而且后面要用一个句子来修饰的。