neoplatonism

n.

[Neo- + Platonism.]
A pantheistic eclectic school of philosophy, of which Plotinus was the chief (a. d. 205-270), and which sought to reconcile the Platonic and Aristotelian systems with Oriental theosophy. It tended to mysticism and theurgy, and was the last product of Greek philosophy.

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IN BRIEF: n. - A system of philosophical and theological doctrines composed of elements of Aristotelianism and oriental mysticism.