A domain is the system of interest within an entity. An example of a domain is Jane's body, where Jane is the entity and the system is the body. The domain language refers to the field of anatomy & it's actions, where Jane's anatomy is an instance of anatomy with her unique characteristics.
All domains have a scope.
Cultural Definition
A geographic area owned or controlled by a single person or organization. "The king ruled his domain harshly."
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."
A group of related items, topics, or subjects.
(mathematics) The set of all possible mathematical entities (points) where a given function is defined.
(mathematics) A ring with no zero divisors; that is, in which no product of nonzero elements is zero.
(mathematics, topology, analysis) An open and connected set in some topology. For example, the interval (0,1) as a subset of the real numbers.
(computing, Internet) Any DNS domain name, particularly one which has been delegated and has become representative of the delegated domain name and its subdomains
(computing, Internet) A collection of DNS or DNS-like domain names consisting of a delegated domain name and all 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; 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
(biology, taxonomy) The highest rank in the classification of organisms, above kingdom; in the three-domain system, one of the taxa Bacteria, Archaea, or Eukaryota.
(biochemistry) A folded section of a protein molecule that has a discrete function
Domain (software engineering) (Wikipedia)
a field of study that defines a set of common requirements, terminology, and functionality for any software program constructed to solve a problem in the area of computer programming, known as domain engineering
Domain Engineering (Wikipedia)
the entire process of reusing domain knowledge in the production of new software systems
Domain (mathematical analysis) (Wikipedia)
a domain is any connected open subset of a finite-dimensional vector space
In biological taxonomy, a domain (also superregnum, superkingdom, empire, or regio) is the highest taxonomic rank of organisms in the three-domain system of taxonomy designed by Carl Woese, an American microbiologist and biophysicist.
Pattern Expression
Any scope in Existence has a domain.