- 1[uncountable] a branch of philosophy that deals with the nature of existence
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- 2[countable] (computing) 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
NAmE//ˌɑntəˈlɑdʒɪkl//
adjectiveSee ontology in the Oxford Advanced Learner's DictionaryCheck pronunciation: ontology