It means that it departs from the spiritual, the holy or the divine. That it is profane or sinful. Relative to the world or earthly pleasures.
Relative to the world. Relative to the life of society: worldly party. Very fond of the things of the world. That much alternates with high society
person that relates to the high society.
Focusing on the things of the world, person Existentialist, earthly delights, common people.
It could be any human being who lives according to the currents of the world regardless of their religion, philosophy or nationality
the imperfect... the human being is a being mundane because perfect thing is the idea