diff --git a/book/source/23-glossary.md b/book/source/23-glossary.md
index 8daeacb..01d9dfe 100644
--- a/book/source/23-glossary.md
+++ b/book/source/23-glossary.md
@@ -188,7 +188,9 @@ OpenPGP Component Key
     An {term}`OpenPGP Primary Key` or {term}`OpenPGP Subkey`. For an in-depth discussion see [](component_keys).
 
 OpenPGP Fingerprint
-    A fingerprint, that is unique for each {term}`OpenPGP Component Key`. See [](fingerprint).
+    An OpenPGP Fingerprint is a shorthand representation of an {term}`OpenPGP Component Key`. Fingerprints effectively act as unique identifiers. See [](fingerprint).
+     
+     The Fingerprint of the {term}`primary component key<OpenPGP Primary Key>` is used as an identifier for the full {term}`OpenPGP Certificate`.
 
 OpenPGP Implementation
     A piece of software implementing the OpenPGP protocol (to some extend).