1. one of a people or community observing a polytheistic religion, as the ancient Romans and Greeks. 2. a person who is not a Christian, Jew, or Muslim; heathen. 3. an irreligious or hedonistic person. 4. of or pertaining to pagans or their religion. 5. irreligious or hedonistic. pa′gan•ism, n. pa′gan•dom, n. syn: See heathen.