Web, domains and email
DNS
Abbreviation for Domain Name System
In short and in plain language
The DNS is the directory of the internet.
It turns domain names into the addresses of servers.
Its records say where the site is. They also say which server takes the mail.
Settings for mail delivery are kept there too.
Definition
The Domain Name System is the directory of the internet that translates domain names into the addresses of the responsible servers. Its records state where the website is hosted and which server accepts email. Settings such as SPF, DKIM and DMARC for email delivery are stored there as well.