"[move] up in the world"의 정의 및 의미

What is the origin of the idiom "move up in the world" and when to use it?

The phrase refers to the idea of social mobility, or the ability to improve one's social or economic status, which became more possible during this time. "Move up" implies progress or advancement, while "in the world" refers to the larger social context. Together, the phrase suggests improving one's position or status within society. The idiom is used to describe a situation in which someone improves their social or economic status or achieves greater success than they previously had.