add eviction to glossary

Author: niteshseram

content/en/docs/reference/glossary/eviction.md

@@ -0,0 +1,18 @@
+---
+title: Eviction
+id: eviction
+date: 2021-05-08
+full_link: /docs/concepts/scheduling-eviction/
+short_description: >
+    Process of terminating one or more Pods on Nodes
+aka:
+tags:
+- operation
+---
+
+Eviction is the process of terminating one or more Pods on Nodes.
+
+<!--more-->
+There are two kinds of eviction:
+* [Node-pressure eviction](/docs/concepts/scheduling-eviction/node-pressure-eviction/)
+* [API-initiated eviction](/docs/concepts/scheduling-eviction/api-eviction/)