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1.
A vaguely defined term from the Latin word Poganus meaning countryman that has become an umbrella term for a group of reconstructed pre-Christian beliefs systems which are often nature centred. Followers of these belief systems share a wide variety of beliefs as these beliefs systems tend not to be formally structured and very focused on individual spirituality. Their beliefs can be polytheistic, animistic, pantheistic, monotheistic, bitheistic, nontheistic or a mixture of the former. Alternatively and less confusingly the term Neopagan can be used as the term has also been used for centuries as a derogotory term for any non-Abramic belief system.
Religions that have come to be considered (neo)pagan include; Wicca, Shamanism, Astatru(thought Asatruars seem to prefer the term Heathen) and, Druidism.
by Nik March 25, 2005
 
2.
A nature-based religion.

Can be seen as having one deity or many, but never any kind of "devil" as this is a purely Christian concept invented much later.
"Is Wicca a form of Paganism?"
"I guess it is, in the same way that Catholisism is a form of Christianity."
by Zoecb January 18, 2005
 
3.
the act of being pagan

group of mostly polytheistic, pre-Christian religions
Wicca is a polytheistic religion, because Wiccans honor not only a god and a goddess, but all of nature as well.
by Megz n Denzer July 09, 2004
 
4.
A state of having little or no religion and delighting in sensual pleasures and material goods: an irreligious or hedonistic person.
Paganism went to Oaks Day with his pals. When his best mate picked up, Paganism followed them home, and watched them on the job from the bushes outside the window.
by Reyab October 30, 2013