n. A person who believes nothing can be known about the existence of a god.
adj. Relating to the belief that the existence of a God is unknowable.
God's Not Dead - Argument Scenes (READ DESCRIPTION FOR MY REVIEW)
(video starts at 0:30)
The agnostic scientist rejected the idea that the universe came from God.
The girl expressed her agnostic views, making the Christians doubtful in their own faith.