A non-Muslim, especially a Christian, an infidel; especially as used by Turkish people with particular reference to Christians such as Greeks, Armenians, Bulgarians, Serbs and Assyrians.
One who does not believe in a certain religion.
One with no religious beliefs.
One who does not believe in a certain principle.
Rejecting a specific religion.
Of, characteristic of, or relating to unbelievers or unbelief.