The branch of philosophy concerned with the ultimate nature of existence. Ontology (the study of the nature of being), cosmology, and philosophical theology are its main branches.Quote: "Every significant artist is a metaphysician, a propounder of beauty-truths and form-theories." Aldous Huxley (1894-1963), British writer. See artist, beauty, form, theory, and truth.Also see empiricism, epistemology, fifth dimension, interdisciplinary, phenomenology, and teleology.