Edu:Abstract Entity

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Abstract Entity

1. An abstract entity may be one constructed by the mind through the process of ABSTRACTION. But the term is also sometimes used for entities regarded as being outside space and time (p.1-2, The Routledge Dictionary of Philosophy, Fourth Edition)
2. An object lacking spatiotemporal properties, but supposed to have being, to exist, or (in medieval Scholastic terminology) to subsist. Abstracta, sometimes collected under the category of universals, include mathematical objects, such as numbers, sets, and geometrical figures, propositions, properties, and relations. (p.3, The Cambridge Dictionary of Philosophy, Second Edition)