In philosophy, the adjective transcendental and the noun transcendence convey the basic ground concept from the word's literal meaning (from Latin), of climbing or going beyond, albeit with varying connotations in its different historical and cultural stages. This article covers the topic from a Western perspective by epoch: Ancient, Medieval, and modern, primarily Continental philosophy.
The first meaning, as part of the concept pair transcendence/immanence, is used primarily with reference to God's relation to the world and is particularly important in theology. Here transcendent means that God is completely outside of and beyond the world, as contrasted with the notion that God is manifested in the world. This meaning originates both in the Aristotelian view of God as the prime mover, a non-material self-consciousness that is outside of the world. Philosophies and philosophers of immanence such as stoicism or pantheism, Spinoza or Deleuze maintain that God is manifested in and fully present in the world and the things in the world.
In the second meaning, which originated in Medieval philosophy, concepts are transcendental if they are broader than what falls within the Aristotelian categories that were used to organize reality conceptually. The prevailing notion of transcendental is that of a quality of being which cannot be predicated on any actually existing thing insofar as it exists. Primary examples of the transcendental are the existent (ens) and the characteristics, designated transcendentals, of unity, truth, and goodness.
In modern philosophy, Kant introduced a new term — transcendental, thus instituting a new, third meaning. In his theory of knowledge, this concept is concerned with the conditions of possibility of knowledge itself. He also opposed the term transcendental to the term transcendent, the latter meaning "that, which goes beyond" (transcends) any possible knowledge of a human being. For him transcendental meant knowledge about our cognitive faculty with regard to how objects are possible a priori. "I call all knowledge transcendental if it is occupied, not with objects, but with the way that we can possibly know objects even before we experience them."