In a subject view, or a world view, the set of conceptual or material things or classes of things that are recognised as existing, or are assumed to exist in context, and their interrelations; in a body of theory, the ontology comprises the domain of discourse, the things that are defined as existing, together with whatever emerges from their mutual implications.
A logical system involving theory of classes, developed by Stanislaw Lesniewski (1886-1939).
A structure of concepts or entities within a domain, organized by relationships; a system model.
The theory of a particular philosopher or school of thought concerning the fundamental types of entity in the universe.
The branch of metaphysics that addresses the nature or essential characteristics of being and of things that exist; the study of being qua being.
A view or outlook regarding fundamental principles underlying some domain.
An academic discipline that seeks truth through reasoning rather than empiricism.
A general principle (usually moral).
A calm and thoughtful demeanor; calmness of temper.
A comprehensive system of belief.
The love of wisdom.