diff --git a/book/source/glossary.md b/book/source/glossary.md
index d653c0b..cd3b105 100644
--- a/book/source/glossary.md
+++ b/book/source/glossary.md
@@ -125,7 +125,7 @@ Creator
     See {term}`Issuer`.
 
 Criticality Flag
-    A flag on {term}`Subpacket`s, that defines their criticality, which is used for validation. See [](criticality-of-subpackets).
+    A flag on {term}`Subpacket`s, that can mark them as critical or non-critical, which is has an influence on signature validation. See [](criticality-of-subpackets).
 
 Cryptographic Key
     A {term}`symmetric<Symmetric Cryptography>` or {term}`asymmetric<Asymmetric Cryptography>` cryptographic key is used for signing and encryption operations. See [](cryptography).