Ontology describes the conditions under which a world and human reality exist
Evidence
By “ontological” here I do not mean a pregiven, independent order of existence, since such an order cannot exist without a particular form of knowledge that makes it what it is. The self, for instance (modern or premodern), is a particular formation that may lend itself to an analysis of quiddity, although it is a constructed entity. Which is also to say that the “ontological” is not a stable or fixed “natural” quality, incapable of mutation.
— Wael Hallaq, Restating Orientalism, 712 (#expands, via linked claim)
Categorization
XREF: connects to: Ontology is descriptive while metaphysics is hypothetical and concerns origins; Heidegger defines human reality through inseparable moments of world, being-in, and being; Ontology specifies structures of being while metaphysics questions the existence of the existent — Jean-Paul Sartre, Being and Nothingness: An Essay on…, 799 (+4 more)