diff --git a/GLOSSARY.md b/GLOSSARY.md
new file mode 100644
index 00000000..fbd17b03
--- /dev/null
+++ b/GLOSSARY.md
@@ -0,0 +1,6 @@
+# Glossary
+
+**Node** — A running instance of the Base network software.  
+**L2** — Layer 2 blockchain built on top of Ethereum.  
+**Sequencer** — Component responsible for ordering transactions.  
+**RPC** — Interface used by applications to communicate with the node.