Definition of "nontheistic"

The most influential contemporary school of non-theistic philosophers, the school of Comte, deny that either theism or atheism can be proved, and proscribe, with impartial rigour, all argument on either side...

1866 February 15, Peter Bayne, “Critical Notices: The Heavenly Father: Lectures on Modern Atheism”, in The Fortnightly Review, volume 4, number 19, page 119

If the universe be regarded as self-existing, then men might hold to evolution, which is distinctly non-theistic, if not atheistic, not requiring a God for the reason that it is founded on the assumption that the possibility and potency and promise of all things reside in matter as matter.

1892, Charles Force Deems, “The Outlook of Theology”, in Christian Thought, volume 9, New York: Wilbur B. Ketcham, page 440

But to determine the position and worth of a religion, whether theistic or non-theistic, it is indispensable that we have some notion of what religion is in itself.

1895, Robert Flint, Theism: being the Baird lecture for 1876, 9th edition, William Blackwood and Sons, Lecture II, page 30

Thus what he called "natural religion" must not be confused with modern brands of naturalistic or nontheistic religion.

1960, Hilary Shelton Smith, American Christianity: 1820-1960‎

The nontheistic tradition of Buddhism generally takes the view that people (with each other's help) can liberate themselves.

1991, Marie Louise Baird, Contemplative Psychology‎, translation of original by H.F. de Wit, page 156