Definition of metaphysics noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˌmetəˈfɪzɪks//
; NAmE NAmE//ˌmetəˈfɪzɪks//
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the branch of philosophy that deals with the nature of existence, truth and knowledge Word Originmid 16th cent.: representing medieval Latin metaphysica (neuter plural), based on Greek ta meta ta phusika ‘the things after the Physics’, referring to the sequence of Aristotle's works: the title came to denote the branch of study treated in the books, later interpreted as meaning ‘the science of things transcending what is physical or natural’.
See the Oxford Advanced American Dictionary entry: metaphysics