metaphysics
noun, plural in form but singular in constructionDefinition of metaphysics
1a(1)
: a division of philosophy that is concerned with the fundamental nature of reality and being and that includes ontology, cosmology, and often epistemology
metaphysics … analyzes the generic traits manifested by existences of any kind— J. H. Randall
(2)
: ontology sense 2
b
: abstract philosophical studies : a study of what is outside objective experience
steered philosophy away from metaphysics and toward the disciplines of natural science and linguistics — Time
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Merriam-Webster unabridged
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The first known use of metaphysics was in 1569
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