diff --git a/src/cco-extensions/ModalRelationOntology.ttl b/src/cco-extensions/ModalRelationOntology.ttl
index 2194b21..7ebbcab 100644
--- a/src/cco-extensions/ModalRelationOntology.ttl
+++ b/src/cco-extensions/ModalRelationOntology.ttl
@@ -705,7 +705,7 @@ mro:ont00001775 rdf:type owl:ObjectProperty ;
                 rdfs:domain obo:BFO_0000004 ;
                 rdfs:range obo:BFO_0000004 ;
                 rdfs:label "is successor of"@en ;
-                <http://www.w3.org/2004/02/skos/core#definition> "A continuant c2 is a successor of some continuant c1 iff there is some process p1 and c1 is an input to p1 and c2 is an output of p1. Inverse of is predecessor. "@en ;
+                <http://www.w3.org/2004/02/skos/core#definition> "x is_successor_of y iff x and y are both instances of Independent Continuant and y is_predecessor_of x. "@en ;
                 cco:ont00001760 <https://www.commoncoreontologies.org/ModalRelationOntology> .