Definition of transcendental adjective in Oxford Advanced Learner's Dictionary. Meaning , pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. There are 12 meanings listed in OED's entry for the word transcendental . See ‘ Meaning & use’ for definitions, usage, and quotation evidence. transcendental : Concerned with the a priori or intuitive basis of knowledge as independent of experience. The Ethics of Baruch Spinoza used the expression " transcendental terms" (in Latin: termini transcendentales) to indicate concepts like Being, Thing, Something, [6] which are so general not to be included in the definitions of species, genus and category. In modern philosophy, Immanuel Kant introduced a new term, transcendental , thus instituting a new, third meaning . In his theory of knowledge, this concept is concerned with the condition of possibility of knowledge itself. He also opposed ...