diff --git a/doc/source/introduction/terms.rst b/doc/source/introduction/terms.rst
index a1ff39ce2..1bdf5a545 100644
--- a/doc/source/introduction/terms.rst
+++ b/doc/source/introduction/terms.rst
@@ -160,11 +160,11 @@ commonly used in the |org| community and in this documentation.
        - You must configure separate, per-region PXEBoot networks.
 
    StarlingX
-     StarlingX is an open source, complete cloud infrastructure software stack for
-     the edge used by the most demanding applications in industrial |IoT|,
+     StarlingX is an open source, complete cloud infrastructure software stack
+     for the edge used by the most demanding applications in industrial |IoT|,
      telecom, and other use cases. The platform creates a fusion between
      OpenStack and Kubernetes to provide a robust and flexible environment for
-     all kinds of workloads, let them be containerized, virtualized or bare
+     all kinds of workloads, including containerized, virtualized or bare
      metal.
 
    Storage
@@ -185,3 +185,32 @@ commonly used in the |org| community and in this documentation.
      An instance of a node provided by software (a hypervisor), which runs
      within the host operating system and hardware.
 
+   Rollback 
+     The process of reverting changes made to a system or database to a
+     previous state. For |prod|, *Rollback* is a capability that is supported
+     during an upgrade or update.
+
+   Restore
+     Bringing back a system or data from a backup or a previously saved state.
+     For |prod|, *Restore* can be used for current release (*N*) or (*N*-1).
+
+   Downgrade
+     The process of moving from a higher version or a newer release of a
+     software, firmware, or operating system to a lower version or an older
+     release.
+
+   Precheck
+     A system state checks intended to confirm the system health for an
+     impending operation.  This check can be performed at any time prior to the
+     system operation execution, but is intended to be executed just prior to
+     confirming that it can be scheduled before actually attempting the operation.
+
+   Prestaging
+     System software media is prepopulated on the system in preparation for an
+     impending operation. *Prestaging* is currently supported for installation
+     and upgrade operation.
+
+   Preinstallation
+     New deployments for a system that is installed in the factory.
+     *Preinstallation* also refers to software media that is installed alongside
+     the existing deployment in preparation for an upgrade. 
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