diff --git a/glossary.asciidoc b/glossary.asciidoc
index a595d5e..d9bd956 100644
--- a/glossary.asciidoc
+++ b/glossary.asciidoc
@@ -249,8 +249,11 @@ Lightning Network, Lightning Network Protocol, Lightning Protocol::
    Other components of the Lightning Network are the gossip protocol, the transport layer, and payment requests.
    The source code is available at https://github.com/lightningnetwork.
 
-Lightning Network Node, Lightning Node, node::
-    TBD.
+Lightning Network Node, Lightning Node::
+    A participant on the Lightning Network.
+    A Lightning user will run Lightning node software in order to interact with other Lightning nodes.
+    Lightning nodes have the ability to open channels with other nodes, send and receive payments, and route payments from other users.
+    Typically a Lightning node user will also run a Bitcoin node.
 
 lnd::
     Implementation of the Lightning Network Protocol by the San Francisco based company https://lightning.engineering[Lightning Labs].