transcendental

a.

1.

Supereminent, transcendent, pre-eminent, surpassing, supreme, consummate.

2.

(Colloq.) Obscure, dark, vague, indefinite, speculative, mystic, mystical, fantastic, filmy, thin, abstruse, indistinct, rarefied, attenuated, unreal, intangible, impalpable, recondite.

3.

(Math.) Non-algebraic, extra-algebraic, involving other than the four fundamental operations.

4.

(Met.) a. A priori, pure, organic, primordial, original, aboriginal, formal, formative, constitutive, relating to form as distinguished from matter, non-empirical. b. Synthetical, combinative, unitive, unifying, unificatory, colligative, constructive of system in experience, warranting inference from the past to the future. c. Non-transcendent, immanent, limited to experience, applicable to phenomena alone, inapplicable to the absolute, to noumena, to the supersensible, or to things in themselves.