agnostic
ag-nos-tic
adjective
Relating to the belief that God's existence is unprovable.
"He maintained an agnostic position on the afterlife."
noun
A person who believes God's existence is unknowable.
"She declared herself an agnostic on religious matters."
Thesaurus
Synonyms: unbelieving, nescient, agnostical, doubter
Antonyms: gnostic