What is the meaning of Commoner?

comparative form of common: more common

A member of the common people who holds no title or rank.

Someone who is not of noble rank.

A student who is not dependent on any foundation for support, but pays all university charges; at Cambridge called a pensioner.

Someone who has a right over another's land. They hold common rights because of residence or land ownership in a particular manor, especially rights on common land. eg: centuries-old grazing rights

One sharing with another in anything.

A prostitute.

Source: wiktionary.org