Definition of ontology
1 : a branch of metaphysics concerned with the nature and relations of being Ontology deals with abstract entities.
2 : a particular theory about the nature of being or the kinds of things that have existence
ontologistplay \än-ˈtä-lə-jist\ noun
Origin and Etymology of ontology
New Latin ontologia, from ont- + -logia -logy
First Known Use: 1663
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