the knowledge of God as gained by the light of natural reason.

the project of attempting to provide proofs for the existence of God based on reason and experience alone

The understanding of the existence of God based on human intellect and observation rather than from religious experience or revelation.

a theology that holds that knowledge of God can be acquired by human reason without the aid of divine revelation

theology attempting to know God, and God's relationship to the world, through nature and human reasoning without divine revelation.

Doctrines concerning God which are attainable via nature and reason, as opposed to those that require special revelation (e.g., scripture).

Knowledge of God by means of the natural intellect, apart from special revelation.

Natural theology is the attempt to find evidence of a God or intelligent designer without recourse to any special or supposedly supernatural revelation. The expression 'natural theology' (theologia naturalis) seems to have been first used by Augustine of Hippo with reference to the deepest theological insights of the classical philosophers. Natural theology (or natural religion) is theology based on reason and ordinary experience.