natural religion noun2 •Religion that arises from human reason and experience, as opposed to that which is based on miraculous or supernatural revelation.I own indeed that most who have evinced the truth of reveal religion, have said something of the weakness of natural religion. — 1812 •Religion that sees God and spirituality as a part of nature, and not as something supernatural.Man is the most exalted manifestation of Nature, and thus the highest object of reverence to him, who is imbued with natural religion. — 1867 formsnatural religions