The view in metaphysics that reality is a unified whole and that all existing things can be ascribed to or described by a single concept or system.
The doctrine that mind and matter are formed from, or reducible to, the same ultimate substance or principle of being.
The doctrine that there is only one ultimate substance or principle, whether mind (idealism), matter (materialism), or some third thing that is the basis of both.
The doctrine that reality is an organic whole without independent parts.
Origin of monism
The word was coined by German philosopher Baron Christian von Wolff and first used in English in 1862, from New Latin monismus, from Greek Î¼ÏŒÎ½Î¿Ï‚ "alone".