domain definition | Dictionary.com

do⋅main

[doh-meyn]

–noun

1.	a field of action, thought, influence, etc.: the domain of science.

2.	the territory governed by a single ruler or government; realm.

3.	a realm or range of personal knowledge, responsibility, etc.

4.	a region characterized by a specific feature, type of growth or wildlife, etc.: We entered the domain of the pine trees.

5.	Law. land to which there is superior title and absolute ownership.

Mathematics.

a.	the set of values assigned to the independent variables of a function.

b.	region (def. 11a).

Computers.

a.	a group of computers and devices on a network that are administered under the same protocol.

b.	the top level in a domain name, indicating the type of organization, geographical location, or both, and officially designated in the suffix, as .com for commercial enterprises in the U.S.

8.	Physics. one of many regions of magnetic polarity within a ferromagnetic body, each consisting of a number of atoms having a common polarity, and collectively determining the magnetic properties of the body by their arrangement.

9.	Crystallography. a connected region with uniform polarization in a twinned ferroelectric crystal.

Origin:
1595–1605; < F domaine, alter., by assoc. with L dominium dominium, of OF demeine < LL dominicum, n. use of neut. of L dominicus of a master, equiv. to domin(us) lord + -icus -ic

Related forms:

do⋅ma⋅ni⋅al, adjective

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re⋅gion

[ree-juh

–noun

1.	an extensive, continuous part of a surface, space, or body: a region of the earth.

2.	Usually, regions. the vast or indefinite entirety of a space or area, or something compared to one: the regions of the firmament; the regions of the mind.

3.	a part of the earth's surface (land or sea) of considerable and usually indefinite extent: a tropical region.

4.	a district without respect to boundaries or extent: a charming region in Connecticut.

5.	a part or division of the universe, as the heavens: a galactic region.

6.	a large indefinite area or range of something specified; sphere: a region of authority.

7.	an area of interest, activity, pursuit, etc.; field: studies in the region of logic.

8.	an administrative division of a city or territory.

9.	Zoogeography. a major faunal area of the earth's surface, sometimes one regarded as a division of a larger area.

10.	Anatomy. a place in or a division of the body or a part of the body: the abdominal region.

11.

Mathematics.

a.	Also called domain. an open connected set.

b.	the union of such a set and some or all of its boundary points.

Origin:
1300–50; ME < AF regiun < L regiōn- (s. of regiō) direction, line, boundary, equiv. to reg(ere) to rule + -iōn- -ion

Synonyms:
1. area, section, portion. 4. locale, site, tract, quarter.

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Link To domain

do·main (dō-mān')

A territory over which rule or control is exercised.
A sphere of activity, concern, or function; a field: the domain of history. See Synonyms at field.
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.
Law
1. The land of one with paramount title and absolute ownership.
2. Public domain.
3. The set of all possible values of an independent variable of a function.
4. An open connected set that contains at least one point.
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.
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.
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; see dem- in Indo-European roots.]

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Domain

Do*main"\, n. [F. domaine, OF. demaine, L. dominium, property, right of ownership, fr. dominus master, owner. See Dame, and cf Demesne, Dungeon.]

1. Dominion; empire; authority.

2. The territory over which dominion or authority is exerted; the possessions of a sovereign or commonwealth, or the like. Also used figuratively.

The domain of authentic history. --E. Everett.

The domain over which the poetic spirit ranges. --J. C. Shairp.

3. Landed property; estate; especially, the land about the mansion house of a lord, and in his immediate occupancy; demesne. --Shenstone.

4. (Law) Ownership of land; an estate or patrimony which one has in his own right; absolute proprietorship; paramount or sovereign ownership.

Public domain, the territory belonging to a State or to the general government; public lands. [U.S.]

Right of eminent domain, that superior dominion of the sovereign power over all the property within the state, including that previously granted by itself, which authorizes it to appropriate any part thereof to a necessary public use, reasonable compensation being made.

Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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Language Translation for : domain

Spanish: dominio, propiedad,

German: die Domäne,

Japanese: 領地

More Translations »

domain

c.1425, in Scottish dialect, from M.Fr. domaine, from O.Fr. demaine "lord's estate," from L. dominium "property, dominion," from dominus "lord, master, owner," from domus "house" (see domestic). Form infl. in O.Fr. by M.L. domanium "domain, estate."

Main Entry: do·main
Pronunciation: dO-'mAn, d&-
Function: noun
1 : any of the three-dimensional subunits of a protein that together make upits tertiary structure, that are formed by folding its linear peptide chain, and that are variously considered to be the basic units of protein structure, function, and evolution domains and heavy chains have four or five domains, depending on class —Journal of the American Medical Association>
2 : the highest taxonomic category in biological classification ranking above the kingdom

domain do·main (dō-mān')
n.
One of the homologous regions that make up an immunoglobulin's heavy and light chains and serve specific immunological functions.

domain (dō-mān') Pronunciation Key

Mathematics The set of all values that an independent variable of a function can have. In the function y = 2x, the set of values that x (the independent variable) can have is the domain. Compare range.
Computer Science A group of networked computers that share a common communications address.
Biology A division of organisms that ranks above a kingdom in systems of classification that are based on shared similarities in DNA sequences rather than shared structural similarities. In these systems, there are three domains: the archaea, the bacteria, and the eukaryotes.
Physics A region in a ferromagnetic substance in which the substance is magnetized with the same polarization throughout.

domain
1. A group of computers whose fully qualified domain names (FQDN) share a common suffix, the "domain name".
The Domain Name System maps hostnames to Internet address using a hierarchical namespace where each level in the hierarchy contributes one component to the FQDN. For example, the computer foldoc.doc.ic.ac.uk is in the doc.ic.ac.uk domain, which is in the ic.ac.uk domain, which is in the ac.uk domain, which is in the uk top-level domain.
A domain name can contain up to 67 characters including the dots that separate components. These can be letters, numbers and hyphens.
2. An administrative domain is something to do with routing.
3. Distributed Operating Multi Access Interactive Network.
4. In the theory of functions, the set of argument values for which a function is defined.
See domain theory.
5. A specific phase of the software life cycle in which a developer works. Domains define developers' and users' areas of responsibility and the scope of possible relationships between products.
6. The subject or market in which a piece of software is designed to work.
(2007-10-01)

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