diff --git a/docs/glossary.rst b/docs/glossary.rst
index aeeb133..e2cc794 100644
--- a/docs/glossary.rst
+++ b/docs/glossary.rst
@@ -86,6 +86,9 @@
       A collaborative engineering organization consolidating
       and optimizing open source software and tools for the Arm architecture.
 
+   LSP
+      A logical secure partition managed by SPM
+
    MMU
       Memory Management Unit