In biological taxonomy, a domain is the highest taxonomic rank of organisms in the three-domain system of taxonomy designed by Carl Woese, an American microbiologist and biophysicist. According to the Woese system, introduced in 1990, the Tree of Life consists of three domains: Archaea, Bacteria, and Eukarya.

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  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. The set of all possible mathematical entities (points) where a given function is defined.
  5. A with no zero divisors; that is, in which no of nonzero elements is zero.
  6. An open and connected set in some topology. For example, the interval (0,1) as a subset of the real numbers.
  7. Any DNS domain name, particularly one which has been delegated and has become representative of the delegated domain name and its subdomains
  8. A collection of DNS or DNS-like domain names consisting of a delegated domain name and all its subdomains
  9. 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. The collection of computers identified by a domain's domain names
  11. A small region of a magnetic material with a consistent magnetization direction; such a region used as a data storage element in a bubble memory
  12. a form of technical metadata that represent the type of a data item, its characteristics, name, and usage
  13. The highest rank in the classification of organisms, above kingdom; in the three-domain system, one of the taxa Bacteria, Archaea, or Eukaryota.
  14. A folded section of a protein molecule that has a discrete function

The above text is a snippet from Wiktionary: domain
and as such is available under the Creative Commons Attribution/Share-Alike License.

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