diff --git a/contributed_definitions/NXchamber.nxdl.xml b/contributed_definitions/NXchamber.nxdl.xml
new file mode 100644
index 000000000..edf318e2a
--- /dev/null
+++ b/contributed_definitions/NXchamber.nxdl.xml
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+<?xml version="1.0" encoding="UTF-8"?>
+<?xml-stylesheet type="text/xsl" href="nxdlformat.xsl"?>
+<!--
+# NeXus - Neutron and X-ray Common Data Format
+# 
+# Copyright (C) 2014-2024 NeXus International Advisory Committee (NIAC)
+# 
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 3 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#
+# For further information, see http://www.nexusformat.org
+-->
+<definition xmlns="http://definition.nexusformat.org/nxdl/3.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" category="base" name="NXchamber" extends="NXobject" type="group" xsi:schemaLocation="http://definition.nexusformat.org/nxdl/3.1 ../nxdl.xsd">
+    <doc>
+         Component of an instrument to store or place objects and specimens.
+    </doc>
+    <field name="name">
+        <doc>
+             Given name/alias.
+        </doc>
+    </field>
+    <field name="description">
+        <doc>
+             Free-text field for describing details about the chamber.
+             For example out of which material was the chamber built.
+        </doc>
+    </field>
+    <group type="NXfabrication"/>
+</definition>