From The Collaborative International Dictionary of English v.0.48 [gcide]:
Neoplatonism \Ne'o*pla"to*nism\, noun [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.
From WordNet (r) 3.0 (2006) [wn]:
1: a system of philosophical and theological doctrines composed of elements of Platonism and Aristotelianism and oriental mysticism; its most distinctive doctrine holds that the first principle and source of reality transcends being and thought and is naturally unknowable; "Neoplatonism was predominant in pagan Europe until the 6th century"; "Neoplatonism was a major influence on early Christian writers and on later medieval and Renaissance thought and on Islamic philosophy"
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