Definition of ontology noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//ɒnˈtɒlədʒi//
    ; NAmE NAmE//ɑːnˈtɑːlədʒi//
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  1. 1[uncountable] a branch of philosophy that deals with the nature of existence
  2. 2[countable] a list of concepts and categories in a subject area that shows the relationships between them a guide to creating a marketing ontology biomedical ontologies
  3. Word Originearly 18th cent.: from modern Latin ontologia, from Greek ōn, ont- ‘being’ + -logy.
See the Oxford Advanced American Dictionary entry: ontology