Definitions for ontologyɒnˈtɒl ə dʒi

This page provides all possible meanings and translations of the word ontology

Princeton's WordNet

  1. ontology(noun)

    (computer science) a rigorous and exhaustive organization of some knowledge domain that is usually hierarchical and contains all the relevant entities and their relations

  2. ontology(noun)

    the metaphysical study of the nature of being and existence


  1. ontology(Noun)

    The branch of metaphysics that addresses the nature or essential characteristics of being and of things that exist; the study of being qua being.

  2. ontology(Noun)

    The theory of a particular philosopher or school of thought concerning the fundamental types of entity in the universe.

  3. ontology(Noun)

    A logical system involving theory of classes, developed by Stanislaw Lesniewski (1886-1939).

  4. ontology(Noun)

    A structure of concepts or entities within a domain, organized by relationships; a system model.

  5. Origin: Originally ontologia (1606, Ogdoas Scholastica, by (Lorhardus)), from ὤν, present participle of εἰμί + λόγος.


  1. Ontology

    Ontology is the philosophical study of the nature of being, becoming, existence, or reality, as well as the basic categories of being and their relations. Traditionally listed as a part of the major branch of philosophy known as metaphysics, ontology deals with questions concerning what entities exist or can be said to exist, and how such entities can be grouped, related within a hierarchy, and subdivided according to similarities and differences.

The Nuttall Encyclopedia

  1. Ontology

    another name for metaphysics (q. v.) or the science of pure being, being at its living source in spirit or God, or Nature viewed as divine, especially as the ground of the spiritual in man and giving substantive being to him.

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