object (Elucidation) An object is a material entity which manifests causal unity & is of a type instances of which are maximal relative to the sort of causal unity manifested 024-BFO A description of three primary sorts of causal unity is provided in Basic Formal Ontology 2.0. Specification and User Guide An organism; a fish tank; a planet; a laptop; a valve; a block of marble; an ice cube material entity material entity