diff --git a/src/cco-imports/bfo-core.ttl b/src/cco-imports/bfo-core.ttl
index 116d602..fcdfade 100644
--- a/src/cco-imports/bfo-core.ttl
+++ b/src/cco-imports/bfo-core.ttl
@@ -612,7 +612,7 @@ skos:scopeNote rdf:type owl:AnnotationProperty .
                                              rdfs:range <http://purl.obolibrary.org/obo/BFO_0000006> ;
                                              dc11:identifier "246-BFO" ;
                                              rdfs:label "spatially projects onto"@en ;
-                                             skos:definition "(Elucidation) spatially projects onto is a relation between some spatiotemporal region b and spatial region c such that at some time t, c is the spatial extent of b at t"@en ;
+                                             skos:definition "x spatially_projects_onto y iff x is an instance of Spatiotemporal Region and y is an instance of Spatial Region and y is the spatial extent of x."@en ;
                                              skos:scopeNote "Users that require more sophisticated representations of time are encouraged to import a temporal extension of BFO-Core provided by the BFO development team. See documentation for guidance: <https://github.com/BFO-ontology/BFO-2020/tree/master/src/owl/profiles/temporal%20extensions>"@en .