Oxford Dictionaries define agnostic (1):

A person who believes that nothing is known or can be known of the existence or nature of God or of anything beyond material phenomena; a person who claims neither faith nor disbelief in God.

Philosophy in Figures

 varieties of atheism: gnostic theist/atheist; agnostic theist/atheist. Weak/Strong atheism. Explicit/Implicit atheism.
(a)theism vs (a)gnosticism source: (2)

Philosophy in Figures Ryan Reece explains the above diagram:

source: (3) ‘the know-ability issue is orthogonal [at right angles] to what one believes’.


(1) Oxford Dictionaries – agnostic

(2) Philosophy in Figures (accessed 12th September 2017)

(3) Philosophy in Figures (accessed 12th September 2017)