domain
Etymology

From Middle English demayne, demain ("rule"), from Old French demeine, demaine, demeigne, domaine ("power"), (French domaine), from Latin dominium, from dominus ("master, proprietor, owner").

Pronunciation
  • (RP) IPA: /dəˈmeɪn/, /dəʊˈmeɪn/
  • (America) IPA: /doʊˈmeɪn/, /dəˈmeɪn/
Noun

domain (plural domains)

  1. A geographic area owned or controlled by a single person or organization.
    The king ruled his domain harshly.
  2. A field or sphere of activity, influence or expertise.
    Dealing with complaints isn't really my domain: get in touch with customer services.
    His domain is English history.
  3. A group of related items, topics, or subjects.
  4. (mathematics, set theory) The set of input (argument) values for which a function is defined.
    1. (more generally, of a binary relation R between A and B) The set A; The subset of A consisting of elements a of A such that there exists an element b in B with (a,b) in R.
  5. (mathematics) A ring with no zero divisors; that is, in which no product of nonzero elements is zero.
    Hyponym: integral domain
  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 [https://web.archive.org/web/20060619063455/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.
  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. (physics) A small region of a magnetic material with a consistent magnetization direction.
  12. (computing) Such a region used as a data storage element in a bubble memory.
  13. (data processing) A form of technical metadata that represent the type of a data item, its characteristics, name, and usage.
  14. (taxonomy) The highest rank in the classification of organisms, above kingdom; in the three-domain system, one of the taxa Bacteria, Archaea, or Eukaryota.
  15. (biochemistry) A folded section of a protein molecule that has a discrete function; the equivalent section of a chromosome.
  16. (geology) An area of more or less uniform mineralization.
Synonyms Antonyms
  • (antonym(s) of “domain of definition of a function”): range
  • (antonym(s) of “domain of definition of a function”): codomain
Translations Translations Translations Translations Translations Translations Translations Translations Translations Translations


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