Word: domain Part of Speech: noun Etymology: Etymology tree Proto-Indo-European *dem- Proto-Indo-European *-s Proto-Indo-European *dṓmder. Proto-Italic *domanos Latin dominus Proto-Indo-European *-(i)yós Proto-Italic *-ijos Proto-Italic *-ios Old Latin -ios Latin -ius Latin -ium Latin dominiumder. Old French demainebor. Middle English demayne English domain From Middle English demayne, demain (“rule”), from Old French demeine, demaine, demeigne, domaine (“power”), (French domaine), from Latin dominium (“property, right of ownership”), from dominus (“master, proprietor, owner”). Doublet of demesne and dominium, and closely related to dominion and domino. See also dame, and compare demain, danger, dungeon. Pronunciation: /ˌdəʊˈmeɪ̯n/, /dəˈmeɪ̯n/, /ˌdoʊ̯ˈmeɪ̯n/, /ˌdəʉ̯ˈmæ̝ɪ̯n/, /dəˈmæ̝ɪ̯n/ 1. A geographic area owned or controlled by a single person or organization. Example: The king ruled his domain harshly. Example: Bears and other ferocious beasts resented man's intrusion into their domain; so, too, did the Blackfoot Indians and other tribes, whose savage hostility was a constant menace to the lives of the toiling engineers. 2. A field or sphere of activity, influence or expertise. Example: Dealing with complaints isn't really my domain: get in touch with customer services. Example: His domain is English history. 3. A group of related items, topics, or subjects. Example: 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. The set of input (argument) values for which a function is defined. 5. The set of input (argument) values for which a function is defined. Labels: broadly 6. A ring with no zero divisors; that is, in which no product of nonzero elements is zero. 7. An open and connected set in some topology. For example, the interval (0,1) as a subset of the real numbers. 8. Any DNS domain name, particularly one which has been delegated and has become representative of the delegated domain name and its subdomains. Labels: Internet Example: 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. 9. A collection of DNS or DNS-like domain names consisting of a delegated domain name and all its subdomains. Labels: Internet 10. 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. 11. The collection of computers identified by a domain's domain names. 12. A small region of a magnetic material with a consistent magnetization direction. 13. Such a region used as a data storage element in a bubble memory. 14. A form of technical metadata that represent the type of a data item, its characteristics, name, and usage. Example: A characteristic of a field. A data domain specifies a data type and applies the minimum and maximum values allowed and other constraints. 15. The highest rank in the classification of organisms, above kingdom; in the three-domain system, one of the taxa Bacteria, Archaea, or Eukaryota. 16. A folded section of a protein molecule that has a discrete function; the equivalent section of a chromosome. 17. An area of more or less uniform mineralization.