diff --git a/src/cco-modules/InformationEntityOntology.ttl b/src/cco-modules/InformationEntityOntology.ttl
index 85e43df..5a0de32 100644
--- a/src/cco-modules/InformationEntityOntology.ttl
+++ b/src/cco-modules/InformationEntityOntology.ttl
@@ -201,7 +201,7 @@ cco:ont00001904 rdf:type owl:ObjectProperty ;
                  rdfs:domain obo:BFO_0000001 ;
                  rdfs:range cco:ont00001163 ;
                  rdfs:label "is measured by"@en ;
-                 skos:definition "y is_measured_by x iff x is an instance of Measurement Information Content Entity and y is an instance of Entity and y measures x."@en ;
+                 skos:definition "y is_measured_by x iff x is an instance of Measurement Information Content Entity and y is an instance of Entity and y is_a_measurement_of x."@en ;
                  cco:ont00001760 "https://www.commoncoreontologies.org/InformationEntityOntology"^^xsd:anyURI .