Merge pull request #6576 from bradtopol/namespace

Added glossary entry for Namespace.

_data/glossary/namespace.yaml

@@ -0,0 +1,9 @@
+id: namespace
+name: Namespace
+full-link: /docs/concepts/overview/working-with-objects/namespaces
+tags:
+- fundamental
+short-description: >
+  An abstraction used by Kubernetes to support virtual clusters on the same physical {% glossary_tooltip term_id="cluster" %}.
+long-description: >
+  Namespaces are used to organize objects in a cluster and provide a way to divide cluster resources. Names of resources need to be unique within a namespace, but not across namespaces.