pagan

Definition:

In Bible times, the term "pagan" was used to describe people who worshiped false gods instead of Yahweh.

Anything associated with these people, such as the altars where they worshiped, the religious rituals they performed, and their beliefs, were also called "pagan."
Pagan belief systems often included the worship of false gods and the worship of nature.
Some pagan religions included sexually immoral rituals or the killing of human beings as part of their worship.