diff --git a/ArtifactOntology.ttl b/ArtifactOntology.ttl
index a9c63bc..5ea898f 100644
--- a/ArtifactOntology.ttl
+++ b/ArtifactOntology.ttl
@@ -1665,7 +1665,7 @@ cco:FrictionReductionArtifactFunction rdf:type owl:Class ;
 ###  http://www.ontologyrepository.com/CommonCoreOntologies/FuelArtifactFunction
 cco:FuelArtifactFunction rdf:type owl:Class ;
                          rdfs:subClassOf cco:ArtifactFunction ;
-                         cco:definition "An Artifact Function that is realized in processes of reacting with other substances in order to release chemical or nuclear energy as heat or ot be used for work."@en ;
+                         cco:definition "An Artifact Function that is realized in processes in which an Artifact is reacted with other substances in order to release chemical or nuclear energy to be used for heat or for work."@en ;
                          cco:definition_source "https://en.wikipedia.org/w/index.php?title=Fuel&oldid=1063590518"^^xsd:anyURI ;
                          cco:is_curated_in_ontology "http://www.ontologyrepository.com/CommonCoreOntologies/Mid/ArtifactOntology"^^xsd:anyURI ;
                          rdfs:label "Fuel Artifact Function"@en .