ontology
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Definition & Meaning of "ontology"in English

Ontology
01

the branch of philosophy that is concerned with concepts such as existence, being, and reality 

Grammatical Information
Animacy status
Abstract
Composition
Compound
Countable
Plural form
ontologies
Examples
Ontology explores questions about what exists, how entities relate to one another, and the fundamental nature of reality. 
02

(in computer science) a structured and comprehensive representation of a knowledge domain, typically hierarchical, specifying entities and the relationships between them 

Examples
The software uses an ontology to organize medical terms and their relationships. 
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