Non-religious senses. Philosophy. = monism, n. 1.

Any theory, or system of thought or belief, that assumes a single ultimate principle, being, force… A theory that denies the duality of matter and…

A theory or system of thought which recognizes a single ultimate principle or being; monism.

The doctrine that there is only one kind of substance, whether mind or matter. Contrasted with dualism, n. 3(a).

A philosophy which explains the phenomena of the universe from a single principle: opposed to pluralism, n. Cf. monism, n.

the theory, first associated with Bertrand Russell and William James, that the world consists of one kind of primal entity or stuff which is…