diff --git a/glossary/DNS.md b/glossary/DNS.md
new file mode 100644
index 000000000..cd1fea4b4
--- /dev/null
+++ b/glossary/DNS.md
@@ -0,0 +1,3 @@
+### DNS
+
+A DNS (Domain Name System) translates domain names to the IP addresses needed to find a particular computer service on a network.