diff --git a/book/source/23-glossary.md b/book/source/23-glossary.md
index 8daeacb..4819c9a 100644
--- a/book/source/23-glossary.md
+++ b/book/source/23-glossary.md
@@ -24,6 +24,11 @@ Authentication Tag
 Authenticity
     See {term}`Authentication`.
 
+Binding Signature
+    A {term}`signature` on a {term}`component` which links that {term}`component` to a {term}`certificate<OpenPGP Certificate>`.
+    
+    See {ref}`binding_sigs` for more.
+
 CA
     See {term}`Certification Authority`.
 
@@ -43,7 +48,9 @@ Certificate Holder
     A person or other entity, that holds an {term}`Transferable Secret Key` and thus is able to modify the accompanying {term}`OpenPGP Certificate`.
 
 Certification
-    "Third party Signature" on a certificate, making a statement about that {term}`certificate<OpenPGP Certificate>`, or an {term}`identity` in the {term}`certificate<OpenPGP Certificate>`.
+    A certification, in OpenPGP, is a signature that makes a statement about an {term}`identity` in a {term}`certificate<OpenPGP Certificate>`, or an entire {term}`certificate<OpenPGP Certificate>`.
+     
+     Most commonly, the term is applied to "[third-party certifications](third_party_cert)," in which an external actor indicates that they have {term}`validated<Validation>` the link between an {term}`identity` and a {term}`certificate<OpenPGP Certificate>`. However, the term is also used for [self-signatures that bind identity components](bind_ident) to a {term}`certificate<OpenPGP Certificate>`.
 
 Certification Key Flag
     A {term}`Key Flag`, indicating that a {term}`Component Key` can be used for issuing third-party {term}`certifications<Certification>`. See [](capabilities_key_flags).
@@ -76,7 +83,9 @@ CTB
     See {term}`Cipher Type Byte`.
 
 Delegation
-    See {term}`Trust signature`
+    OpenPGP users can [delegate authentication decisions](delegation) to third parties, and thus rely on {term}`certifications<Certification>` they issue. The remote party is then called a "{term}`trusted introducer`".
+    
+    This kind of delegation involves {term}`certifications<Certification>` that include the {term}`trust signature` subpacket.
 
 Direct Key Signature
     A {term}`Signature` that sets preferences and advertises features applicable to an entire {term}`Certificate`. See [](direct_key_signature).
@@ -85,7 +94,7 @@ Encryption Key Flag
     A {term}`Key Flag`, indicating that a {term}`Component Key` can be used for encrypting data. See [](capabilities_key_flags).
 
 Expiration
-    A mechanism by which a {term}`Component` is invalidated due to the {term}`Expiration Time` of its binding signature being older than the {term}`Reference Time` by which it is validated.
+    A mechanism by which a {term}`Component` is invalidated due to the {term}`Expiration Time` of its {term}`binding signature` being older than the {term}`Reference Time` by which it is validated.
 
 Expiration Date Subpacket
     An {term}`OpenPGP Signature Subpacket Type` which defines the {term}`Expiration Time` for an {term}`OpenPGP Signature Packet`.
@@ -188,7 +197,9 @@ 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).
@@ -203,7 +214,7 @@ OpenPGP Private Key
     See {term}`Transferable Secret Key`.
 
 OpenPGP Primary Key
-    The primary key of an {term}`OpenPGP Certificate`. For a more detailed discussion, see [](primary_key).
+    An {term}`OpenPGP Component Key` that is used in the primary key role of an {term}`OpenPGP Certificate`. For a more detailed discussion, see [](primary_key).
 
 OpenPGP Signature
     See {term}`OpenPGP Signature Packet`.
@@ -221,7 +232,7 @@ OpenPGP Signature Type
     The type of an {term}`OpenPGP Signature Packet` is defined by its {term}`Signature Type ID`. See [](signature_types).
 
 OpenPGP Subkey
-    A subkey of an {term}`OpenPGP Certificate`. For a more detailed discussion, see [](subkeys).
+    An {term}`OpenPGP Component Key` that is used in the subkey role, in an {term}`OpenPGP Certificate`. For a more detailed discussion, see [](subkeys).
 
 Owner
     See {term}`Certificate Holder`.
@@ -344,7 +355,12 @@ Trust Model
     A model by which trust between {term}`identities<Identity>` associated with different {term}`OpenPGP Certificates<OpenPGP Certificate>` is created. See [](third_party_identity_certifications).
 
 Trust signature
-    a specific type of certification for a certificate, which marks that key as a "trusted introducer" (i.e. the party that creates the trust signature signals that they will trust certifications that the "trusted introducer" makes on certificates)
+    The *trust signature* subpacket on a certifying {term}`signature<OpenPGP Signature Packet>` is used for {term}`delegation` of {term}`authentication` decisions. With this feature, an OpenPGP user can designate a {term}`certificate<OpenPGP Certificate>` as a "{term}`trusted introducer`" and opt to rely on {term}`certifications<Certification>` they issue.
+
+Trusted introducer
+    OpenPGP users can choose to rely on {term}`certifications<Certification>` issued by a third party. The remote party of such a {term}`delegation` is called a "trusted introducer".
+     
+     See {ref}`delegation` for more details. 
 
 TSK
     See {term}`Transferable Secret Key`.