ontologies

/AA0 N T AA1 L AH0 JH IY0 Z/
noun
  1. 1

    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. 2

    In a subject view, or a world view, the set of conceptual or material things or classes of things that are recognised as existing, or are assumed to exist in context; in a body of theory, the ontology comprises the domain of discourse, the things that are defined as existing, together with whatever emerges from their mutual implications.

  3. 3

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

  4. 4

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

  5. 5

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

Source: https://en.wiktionary.org/wiki/ontologies, https://en.wiktionary.org/wiki/ontology