Doubt, uncertainty, or scepticism regarding any subject of dispute.
The view that absolute truth or ultimate certainty is unattainable, especially regarding knowledge not based on experience or perceivable phenomena.
Doubt, uncertainty, or scepticism regarding the existence of a god or gods.
The view that the existence of God or of all deities is unknown, unknowable, unproven, or unprovable.
The condition and quality of being godly, pious, scrupulously observant of all the teachings of one's religion, practicing virtue and avoiding sin.