Any of various religions other than Christianity or Judaism or Islamism.

 Paganism is a spiritual way of life which has its roots in the ancient nature religions of the world. It is principally rooted in the old religions of Europe, though some adherents also find great worth in the indigenous beliefs of other countries. Such belief in the sacredness of all things can be found world-wide. Pagans see this as their heritage, and retain the beliefs and values of their ancestors in forms adapted to suit modern life. They celebrate the sanctity of Nature, revering the Divine in all things; the vast, unknowable spirit that runs through the universe, both seen and unseen.

But there’s more folks, much, much more & I will now hand it over to the scholars for a more in-depth discussion.