Definition & Meaning of "[carry] weight"

What is the origin of the idiom "carry weight" and when to use it?

The idiom "carry weight" is believed to have originated in the 17th century. At the time, it was common to say that something had "weight" if it was important or significant. The idiomatic expression "carry weight" is often used to describe a person, idea, or influence that holds significant importance or influence in a given situation or context. It suggests that the person or thing has a substantial impact or is taken seriously by others.