Etymology

< demeine, demain (rule), demeine, demaine, demeigne, domaine (power), domaine < < . See dame, and confer demain, danger, dungeon.

Noun

1. A geographic area owned or controlled by a single person or organization.
2. A sphere of influence.
3. A group of related items, topics, or subjects.
4. The set of all possible mathematical entities (points) where a given function is defined.
5. Any DNS domain name, particularly one which has been delegated and has become representative of the delegated domain name and its subdomains
   • 2000, BIND 9 Administrator Reference Manual (9.3.2), Internet Software Consortium http://www.bind9.net/manual/bind/9.3.2/Bv9ARM.ch01.html

     Every name in the DNS tree is a domain, even if it is terminal, that is, has no subdomains.

6. A collection of DNS or DNS-like domain names consisting of a delegated domain name and all its subdomains
7. A collection of information having to do with a domain, the computers named in the domain, and the network on which the computers named in the domain reside
8. The collection of computers identified by a domain's domain names
9. In the three-domain system, the highest rank in the classification of organisms, above kingdom; in other taxonomic systems, a similarly high rank
10. In the three-domain system, one of three taxa at that rank: Bacteria, Archaea, or Eukaryota.

Usage notes

Used in a context in which domain name services, or domain name like services, are managed in a fashion that is integrated with the management of other computer and network related information. Used in the same context as the collection of information domain sense.