From f1a84e1348f83fa85a4ec4f5e76dbae26a92307a Mon Sep 17 00:00:00 2001
From: kdayday <kdayday@users.noreply.github.com>
Date: Fri, 31 May 2024 15:14:23 -0600
Subject: [PATCH] Add fixed definition

---
 docs/src/modeler_guide/glossary.md | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/docs/src/modeler_guide/glossary.md b/docs/src/modeler_guide/glossary.md
index 8bf0520eb8..fdaa0279ca 100644
--- a/docs/src/modeler_guide/glossary.md
+++ b/docs/src/modeler_guide/glossary.md
@@ -42,7 +42,9 @@
 
 ## F
 
-* *Fixed*: 
+* *Fixed*: A predetermined variable or quantity, which can be time-varying or an expression.
+  Examples: A distributed energy resource that cannot be curtailed or dispatched whose output
+  is determined by the weather, or a time-varying reserve requirement that must be met.
 
 * *Forecast*: Predicted values of a time-varying quantity that commonly features
   a look-ahead and can have multiple data values representing each time period.