diff --git a/book/source/glossary.md b/book/source/glossary.md
index f48826e..0a0f1cd 100644
--- a/book/source/glossary.md
+++ b/book/source/glossary.md
@@ -350,7 +350,7 @@ OpenPGP Key
     Used either for an {term}`OpenPGP Certificate` (containing public key material and metadata), or for an {term}`OpenPGP Private Key`. See [](/certificates) for an in-depth discussion.
 
 OpenPGP Message
-    A data structure, which contains OpenPGP components such as {term}`OpenPGP Certificate` or {term}`OpenPGP Signature Packet` and plaintext or encrypted data.
+    A data structure, which contains OpenPGP packets, such as {term}`literal<Literal Data Packet>`, {term}`compressed<Compressed Data Packet>`, {term}`encrypted<Encrypted Data>` or {term}`signed<Data Signature>` data.
 
 OpenPGP Public Key
     See {term}`OpenPGP Certificate`.