domain

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English [edit]

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Etymology [edit]

From Middle English demeine, demain (rule), Old French demeine, demaine, demeigne, domaine (power), (French domaine), from Latin dominium (property, right of ownership), from dominus (master, proprietor, owner). See dame, and confer demain, danger, dungeon.

Pronunciation [edit]

Noun [edit]

domain (plural domains)

  1. A geographic area owned or controlled by a single person or organization.
    The king ruled his domain harshly.
  2. A sphere of influence.
    Dealing with complaints isn't really my domain: get in touch with customer services.
  3. A group of related items, topics, or subjects.
    • 2012 January 1, Michael Riordan, “Tackling Infinity”, American Scientist, volume 100, number 1, page 86: 
      Some of the most beautiful and thus appealing physical theories, including quantum electrodynamics and quantum gravity, have been dogged for decades by infinities that erupt when theorists try to prod their calculations into new domains. Getting rid of these nagging infinities has probably occupied far more effort than was spent in originating the theories.
  4. (mathematics) The set of all possible mathematical entities (points) where a given function is defined.
  5. (mathematics) A ring with no zero divisors; that is, in which no product of nonzero elements is zero.
  6. (mathematics, topology, analysis) An open and connected set in some topology. For example, the interval (0,1) as a subset of the real numbers.
  7. (computing, Internet) 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 [1]
      Every name in the DNS tree is a domain, even if it is terminal, that is, has no subdomains.
  8. (computing, Internet) A collection of DNS or DNS-like domain names consisting of a delegated domain name and all its subdomains
  9. (computing) 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
  10. (computing) The collection of computers identified by a domain's domain names
  11. (computing) A small magnetized area of a bubble memory storing one bit, a bubble.
  12. (biology, taxonomy) In the three-domain system, the highest rank in the classification of organisms, above kingdom; in other taxonomic systems, a similarly high rank
  13. (biology, taxonomy) In the three-domain system, one of three taxa at that rank: Bacteria, Archaea, or Eukaryota.
  14. (biochemistry) A folded section of a protein molecule that has a discrete function

Usage notes [edit]

  • (collection of information): 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.
  • (collection of computers): Used in the same context as the collection of information domain sense.

Synonyms [edit]

Antonyms [edit]

  • (domain of definition of a function): range
  • (domain of definition of a function): codomain

Derived terms [edit]

Related terms [edit]

Translations [edit]

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