A formal representation of knowledge within a domain, defining concepts and their relationships.
In the context of knowledge representation and AI, an ontology is a structured framework that defines a set of concepts within a domain and the relationships between those concepts. It provides a shared understanding of a subject area by specifying properties, attributes, and the ways in which entities can relate to one another. Ontologies are crucial for organizing complex information, enabling semantic interoperability, and facilitating sophisticated reasoning by AI systems.