n.

1. A territory over which rule or control is exercised.
2. A sphere of activity, concern, or function; a field: the domain of history. See synonyms at field.
3. Physics. Any of numerous contiguous regions in a ferromagnetic material in which the direction of spontaneous magnetization is uniform and different from that in neighboring regions.
4. Law.
   1. The land of one with paramount title and absolute ownership.
   2. Public domain.
5. Mathematics.
   1. The set of all possible values of an independent variable of a function.
   2. An open connected set that contains at least one point.
6. Biology. Any of three primary divisions of living systems, consisting of the eukaryotes, bacteria, and archaea, that rank above a kingdom in taxonomic systems that are based on similarities of DNA sequences.
7. Computer Science. A group of networked computers that share a common communications address.

[French domaine, blend of Old French demaine (from Late Latin dominicum) and Latin dominium, property, both from dominus, lord.]

A region in a solid within which elementary atomic or molecular magnetic or electric moments are uniformly aligned.

Ferromagnetic domains are regions of parallel-aligned magnetic moments. Each domain may be thought of as a tiny magnet pointing in a certain direction. The relatively thin boundary region between two domains is called a domain wall. Within a wall the magnetic moments rotate from the direction of one of the domains to the direction in the adjacent domain.

A ferromagnet generally consists of a large number of domains. For example, a sample of pure iron at room temperature contains many domains whose directions are distributed randomly, making the sample appear to be unmagnetized as a whole. Iron is called magnetically soft since the domain walls move easily if a magnetic field is applied. In a magnetically hard or permanent magnet material a net macroscopic magnetization is introduced by exposure to a large external magnetic field, but thereafter domain walls are difficult to either form or move, and the material retains its overall magnetization.

Antiferromagnetic domains are regions of antiparallel-aligned magnetic moments. They are associated with the presence of grain boundaries, twinning, and other crystal inhomogeneities.

Ferroelectric domains are electrical analogs of ferromagnetic domains. See also Antiferromagnetism; Ferroelectrics; Ferromagnetism; Magnetic materials; Magnetization; Twinning (crystallography).

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(1) In a LAN, a subnetwork made up of a group of clients and servers under the control of one security database. Dividing LANs into domains improves performance and security.

(2) In a communications network, all resources under the control of a single computer system.

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On TCP/IP Networks, such as the Internet, a group of connected computers, which may contain subdomains. On the Internet, domains are denoted by a three-letter suffix. Some of the most common are edu=educational institution; gov=government site, other than state-funded universities; com=commercial site; mil=military site; net=network site; and org=nonprofit or private organization. In addition, most countries, states, provinces, and regions have domain names. ISPs that offer domain name hosting may offer ‘virtual domains.' The domain name is actually an alias for the IP address, which is expressed in numbers. The period in a domain name is pronounced ‘dot,' with the result that most large corporations can be found on the Web at some version of ‘CorporationName dot com.'

noun

A sphere of activity, experience, study, or interest: area, arena, bailiwick, circle, department, field, orbit, province, realm, scene, subject, terrain, territory, world. Slang bag. See territory.

The domain of a quantifier is the set of things that serve as possible values for its variable. The domain of a relation is the set of things that bear the relation to something else.

This entry contains information applicable to United States law only.

The complete and absolute ownership of land. Also the real estate so owned. The inherent sovereign power claimed by the legislature of a state, of controlling private property for public uses, is termed the right ofeminent domain.

National domain is sometimes applied to the aggregate of the property owned directly by a nation. Public domain embraces all lands, the title to which is in the United States, including land occupied for the purposes of federal buildings, arsenals, dock-yards, and so on, and land of an agricultural or mineral character not yet granted to private owners.

Sphere of influence. Range of control or rule; realm.

1. region of a protein with a characteristic tertiary structure and function; homologous domains may occur on different proteins.
2. regions of the heavy chain of immunoglobulins. See cH domain, cL domain.

• transmembrane d. — for any membrane-bound protein or glycoprotein, those amino acid sequences that traverse and are present in the cell membrane. In receptor biology, transmembrane domains are distinguished from the extracellular ligand binding domains, cytoplasmic domains, and from immunological domains.

A moveable magnetized area in a magnetized material. Also known as magnetic domain.

IN BRIEF: n. - An area that you are interested in or are communicating about; People in general; Territory over which rule or control is exercised; The set of values of the independent variable for which a function is defined.

Tutor's tip: The lord of the manor protected his "demesne" (the possession of land) by making sure that his neighbors thought it was their "domain' (complete and absolute ownership of land) too.

This entry is from Wikipedia, the leading user-contributed encyclopedia. It may not have been reviewed by professional editors (see full disclaimer)

Dansk (Danish)
n. - område, rige, ejendom, indflydelsessfære, værdiområde, magnetfelt, domæne

Nederlands (Dutch)
domein, gebied, rijk

Français (French)
n. - (lit) domaine, (fig, Math, etc) propriété, terres (npl)

Deutsch (German)
n. - Bereich, Domäne, Ländereien, Staatsgut

Ελληνική (Greek)
n. - κτήματα, γαίες, επικράτεια, περιοχή, πεδίο

Italiano (Italian)
dominio

Português (Portuguese)
n. - domínio (m), território (m)

Русский (Russian)
область, владение

Español (Spanish)
n. - campo, esfera, ámbito, dominio, finca

Svenska (Swedish)
n. - domän

中文（简体） (Chinese (Simplified))
领土, 范围, 领地

中文（繁體） (Chinese (Traditional))
n. - 領土, 範圍, 領地

한국어 (Korean)
n. - 영지, 영역

日本語 (Japanese)
n. - 領地, 領土, 地所, 範囲, 生育圏, 変域, 整域, 領域, 分野

العربيه (Arabic)
‏(الاسم) حقل, ميدان معرفه أو علم, أرض أو مقاطعه يمتلكها شخص من النبلا أو حكومه مثلا, مجال معرفه أو علم‏

עברית (Hebrew)
n. - ‮ריבונות, תחום, אדנות‬

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mongoose domain