(mathematics) A ring with no zero divisors; that is, in which no product of nonzero elements is zero.
(mathematics) An open and connected set in some topology. For example, the interval (0,1) as a subset of the real numbers.
(computing) Any DNSdomain name, particularly one which has been delegated and has become representative of the delegated domain name and its subdomains.
(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.
(computing) The collection of computers identified by a domain's domain names.
(physics) A small region of a magnetic material with a consistent magnetization direction.
(computing) Such a region used as a data storage element in a bubble memory.
(data processing) A form of technical metadata that represent the type of a data item, its characteristics, name, and usage.
(taxonomy) The highest rank in the classification of organisms, above kingdom; in the three-domain system, one of the taxa Bacteria, Archaea, or Eukaryota.