diff --git a/src/cco-imports/bfo-core.ttl b/src/cco-imports/bfo-core.ttl
index c5b5a49..22bff1a 100644
--- a/src/cco-imports/bfo-core.ttl
+++ b/src/cco-imports/bfo-core.ttl
@@ -571,7 +571,7 @@ skos:scopeNote rdf:type owl:AnnotationProperty .
                                              rdfs:range <http://purl.obolibrary.org/obo/BFO_0000008> ;
                                              dc11:identifier "132-BFO" ;
                                              rdfs:label "occupies temporal region"@en ;
-                                             skos:definition "p occupies temporal region t =Def p is a process or process boundary & the spatiotemporal region occupied by p temporally projects onto t"@en ;
+                                             skos:definition "x occupies_temporal_region y iff x is an instance of process or process boundary and y is an instance of temporal region and the spatiotemporal region that x occupies temporally projects onto y."@en ;
                                              skos:example "The Second World War occupies the temporal region September 1, 1939 - September 2, 1945"@en .