Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun ontology

2 senses of ontology

Sense 1
ontology -- ((computer science) a rigorous and exhaustive organization of some knowledge domain that is usually hierarchical and contains all the relevant entities and their relations)
       => arrangement, organization, organisation, system -- (an organized structure for arranging or classifying; "he changed the arrangement of the topics"; "the facts were familiar but it was in the organization of them that he was original"; "he tried to understand their system of classification")

Sense 2
ontology -- (the metaphysical study of the nature of being and existence)
       => metaphysics -- (the philosophical study of being and knowing)