Short for Domain Name System (or Service or Server), an Internet service that translates domain names into IP addresses.

Every time you use a domain name, therefore, a DNS service must translate the name into the corresponding IP address.

For example, the domain name www.justclear.com might translate to 198.105.232.4.

If one DNS server doesn’t know how to translate a particular domain name, it asks another one, and so on, until the correct IP address is returned.