A religious system or belief based on natural reason and observation rather than on supernatural revelation. Occasionally: a particular belief…

(a) = natural religion, n.; (b) a religion involving the worship of natural objects and phenomena in place of a more formal system of religious…

Ethics. Action arising from or based on natural instincts, without spiritual guidance; a system of morality or religion derived only from human…

Theology. The holding or adoption of novel (esp. rationalistic) views; rationalism. Now rare.

the belief that a god or (usually) gods create and inhabit inanimate objects and natural phenomena; the worship of such objects and phenomena.

A stage of religious development supposed to have preceded animism, in which material objects were believed to contain spiritual energy.