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Domain has several meanings:

Contents 1 General 2 Sciences 3 Mathematics 4 Information technology 5 Etymology

General

• some kind of territory, such as (for example) a demesne or a realm
• synonymous with field, e.g. "the domain of computer science"
• public domain, a body of works and knowledge without proprietary interest
• domain of discourse in symbolic logic
• eminent domain, the power of government to confiscate private property for public use
• The Domain, a large open space near the central business district of Sydney, Australia
• The Domain, a large inner-city park in Auckland, New Zealand containing an ancient volcano and the War Memorial Museum

Sciences

• in biology, a domain forms a subdivision even larger than a kingdom
• in biochemistry and protein science, a domain is an autonomously folding functional module of a protein
• in physics a domain comprises a region of a solid inside which a property is uniform (for example magnetic domain in ferromagnetism)

Mathematics

In mathematics domain can refer to:

• the domain of a function
• an ordered structure studied in domain theory
• domain (ring theory), integral domain or Euclidean domain — types of ring
• an open and connected set

Information technology

In information technology, the term domain can refer to:

• a machine or virtual host on the Internet; the name of a domain is called a "domain name"; do not confuse a domain name with the domain itself
• a Windows Server domain, a centrally-managed group of computers using the Windows operating-system
• a broadcast domain in computer networking
• an application domain - the kinds of purposes for which users use a software system
• a software engineering domain - a field of study that defines a set of common requirements, terminology, and functionality for any software program constructed to solve a problem in that field. See also domain-specific programming languages.
• a Common Language Runtime application domain, a mechanism for separating executed applications (similar to a process)

Atomic domain - elements of the domain are considered to be indivisible units

Etymology

The original etymological implication of the word domain carries the idea of something ruled. Compare dominion.

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