diff --git a/glossary/Class.md b/glossary/Class.md
new file mode 100644
index 000000000..45d8040ee
--- /dev/null
+++ b/glossary/Class.md
@@ -0,0 +1,3 @@
+### Class
+
+In object-oriented programming, a class is a template definition of an object's properties and methods.
diff --git a/glossary/keyword_database b/glossary/keyword_database
index 432ddd0ed..075ceef0e 100644
--- a/glossary/keyword_database
+++ b/glossary/keyword_database
@@ -2,6 +2,7 @@ argument
 array
 boolean
 callback
+class
 constant
 cross-site-scripting-xss
 currying