From a Christian viewpoint, pagans are generally characterized as those who are caught up in any religious ceremony, act, or practice that is not distinctly Christian. Correspondingly, Jews and Muslims also use the term “pagans” to describe those outside their religion. Others define the term “paganism” as any religion outside of Buddhism, Hinduism, Judaism, and Christianity; whereas some argue that it is anyone with no religion at all.
Paganism comes from the Latin word paganus, which means “country dweller” and can refer to polytheism or the worship of more than one god, such as in ancient Rome. A pagan is also considered to be one who, for the most part, has no religion and indulges in worldly delights and material possessions; someone who reveres in sensual pleasures; a hedonistic or self-indulgent individual. Another more modern term is “neo-paganism” which refers to some of the contemporary forms of paganism such as Wicca, Druidry, and Gwyddons.
These modern “pagan” practices are actually similar to their ancient counterparts in that they rely heavily on hedonism—sensual gratification and self-indulgence and the pursuit of happiness and pleasure to the exclusion of everything else. In ancient times, sexual ceremonies were a major part of pagan religions. The Old Testament references these perverted religions in such passages as Deuteronomy 23:17,Amos 2:7-8, and Isaiah 57:7-8.
Read more: http://www.gotquestions.org/pagan-paganism.html