- [uncountable]
a branch of philosophy that deals with the nature of existence 本体论 - [countable]
a list of concepts and categories in a subject area that shows the relationships between them 本体（一个主题下不同概念及类别） a guide to creating a marketing ontology 市场本体构建指南 biomedical ontologies 生物医学本体论
Word Originearly 18th cent.: from modern Latin ontologia, from Greek ōn, ont- ‘being’ + -logy.