Definitions of domain name system on the Web:

• The Domain Name System (DNS) is a hierarchical naming system for computers, services, or any resource participating in the Internet. ...
  en.wikipedia.org/wiki/Domain_Name_System
• (Internet) The distributed database, sometimes including all the supporting hardware or software infrastructure, the Internet uses to translate ...
  en.wiktionary.org/wiki/Domain_Name_System
• The Domain Name System is the system that translates Internet domain names into IP numbers. A "DNS Server" is a server that performs this kind of translation.
  dedicated.sbcis.sbc.com/NDWS/faq/terms.jsp
• The hierarchical referencing system by which easy-to-remember domain name addresses (such as "mycompany.com") are mapped to numeric IP addresses (such as "123.123.4.5") on the Internet. Note that the acronym DNS can stand for both Domain Name System and Domain Name Service.
  www.namesecure.com/pages/web-services-glossary-abcd.jhtml
• An addressing system that enables websites on the Internet to be reached by a simple name rather than by an IP address or numbers. ...
  www.envision.ca/templates/resources.asp
• The DNS maps Internet addresses. To function as part of the Internet, a host needs a domain name that has an associated Internet Protocol (IP) address record. The DNS is a database system that looks up host IP addresses based upon domain names. For example, if you ask for www.thisismyhost. ...
  www.sapalovelez.com/definition_and_commonterms.htm
• The Domain Name System (DNS) associates various sorts of information with so-called domain names. Most importantly, it serves as the internet phone book by translating human-readable computer hostnames, eg www.yourdomain.com, into the IP addresses, eg 80.120. ...
  www.fdezine.co.uk/jargon.htm
• Usually just called DNS, this is a distributed database on the Internet that maps domain names to IP addresses and vice versa.
  www.atsf.co.uk/mim/glossary.php
• The Internet naming scheme which consists of a hierarchical sequence of names, from the most specific to the most general (left to right ...
  www.cset.sp.utoledo.edu/glossary.html
• Domain Name System. DNS servers are located at many strategic places on the nets to resolve the routing of e-mail and Internet connections.
  www.keshvani.com/thesis/glossary.html
• A 'domain name' is given to each computer or network connected to the Internet, providing an alphanumeric address that is easier to ...
  publications.europa.eu/vademecum/vademecum/9313fdfe-c49e-119e-45c6a6441e63e066_en.html
• A system for translating computer names into numeric Internet addresses. If there is a problem with the DNS you use you may not be able to access ...
  iss.leeds.ac.uk/info/257/getting_help/374/web_glossary
• a naming device that makes Internet addresses easier to remember by allowing a domain name to be used in place of a computer’s IP address, which ...
  www.fairwindspartners.com/en/knowledge-center/glossary
• A method of translating Internet addresses so that computers connected in the Internet can find each other. A DNS server translates a numerical address assigned to a computer (such as 198.00.215.11) into a sequence of words, and vice versa.
  validwebdesigns.com/glossary/
• This is a special computer within your ISP's network that translates IP addresses into host names.
  www.nintendo.com/consumer/wfc/en_na/customersupport/glossary.jsp