Pagan n. : One who worships false gods; an idolater; a heathen; one who is neither a Christian, a Mohammedan, nor a Jew.

Pagan n. : Of or pertaining to pagans; relating to the worship or the worshipers of false goods; heathen; idolatrous, as, pagan tribes or superstitions.

Example:
Pagans: How should Pagan parents handle discussions of Christianity with children?

Taxonomy
Paganism, Pagan, religions, paganus, heathen, Christians, faiths, Abrahamic religions, ethnic religions, classical Latin, population, adherents, Greek, country dweller, Polytheism, folklore, Classical Antiquity, Africa.

Defination from the web:
... While pagan is attested in English from the 14th century, there is no evidence that the term paganism was in use in English before the 17th century. ...