diff --git a/sasdata/metadata.py b/sasdata/metadata.py
index 27edce4..2db79a7 100644
--- a/sasdata/metadata.py
+++ b/sasdata/metadata.py
@@ -397,8 +397,8 @@ def summary(self):
             "  " + "="*len(self.title) +
                            "=======" +
             "="*len(self.run) + "\n\n" +
-            f"Definition: {self.title}\n" +
+            f"Definition: {self.definition}\n" +
             self.process.summary() +
             self.sample.summary() +
             self.instrument.summary() +
-            self.transmission_spectrum.summary())
\ No newline at end of file
+            self.transmission_spectrum.summary())