domain

[ doh-meyn ]

/ doʊˈmeɪn /

SEE MORE SYNONYMS FOR domain ON THESAURUS.COM

noun

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

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

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

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

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

Mathematics.

the set of values assigned to the independent variables of a function.
region(def 11a).

Computers.

a group of computers and devices on a network that are administered under the same protocol.
the top level in a domain name, indicating the type of organization, geographical location, or both, and officially designated in the suffix, as .edu for institutions of higher education.

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.

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

Nearby words

dolus, dom, dom., dom. rep., domagk, domain, domain name, domal, domatium, dome, dome car

Origin of domain

1595–1605; < French domaine, alteration, by association with Latin dominium dominium, of Old French demeine < Late Latin dominicum, noun use of neuter of Latin dominicus of a master, equivalent to domin(us) lord + -icus -ic

Related forms

do·ma·ni·al, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for domain

As it turns out, my cell phone number had been searchable through a GoDaddy domain listing I obtained several years ago.
A Female Writer’s New Milestone: Her First Death Threat|Annie Gaus|December 1, 2014|DAILY BEAST
But for the National Draft Ben Carson for President PAC to get going, they needed a Web domain.
Ben Carson’s Bizarrely Serious, Seriously Bizarre Campaign Crew|Olivia Nuzzi|November 12, 2014|DAILY BEAST
The executive suite has been the domain of the talls: Barack Obama is six-one.
For Short Men in 2014, The News Is Surprisingly Good|Kevin Bleyer|September 13, 2014|DAILY BEAST
And in August, the same eBay account put the domain Newsball.com up for auction, for $21,000,000.
He Bullies Kids and Calls It News|Brandy Zadrozny|June 26, 2014|DAILY BEAST

An alert soul got hold for the domain allianceforastrongamerica.com and produced a more informative parody.
The Cheneys’ Permanent War|Heather Hurlburt|June 18, 2014|DAILY BEAST
But nowhere, save perhaps in the domain of religion, does hypocrisy play a greater part than in the sexual domain.
The Sexual Question|August Forel
On the eighth, Menendez took formal possession of his domain.
Pioneers Of France In The New World|Francis Parkman, Jr.
They roamed about their domain with the satisfaction of princes in a palace.
Blow The Man Down|Holman Day
It is to be hoped that 243 this picturesque and useful race will be allowed to extend its domain.
Wild Life on the Rockies|Enos A. Mills
Sleep, being a function, is outside the domain of the will, and he had had little of it since Tuesday.
Black Oxen|Gertrude Franklin Horn Atherton

British Dictionary definitions for domain

domain

/ (dəˈmeɪn) /

noun

land governed by a ruler or government

land owned by one person or family

a field or scope of knowledge or activity

a region having specific characteristics or containing certain types of plants or animals

Australian and NZ a park or recreation reserve maintained by a public authority, often the government

law the absolute ownership and right to dispose of landSee also demesne, eminent domain

maths

the set of values of the independent variable of a function for which the functional value existsthe domain of sin x is all real numbers Compare range (def. 8a)
any open set containing at least one point

logic another term for universe of discourse domain of quantification

philosophy range of significance (esp in the phrase domain of definition)

Also called: magnetic domain physics one of the regions in a ferromagnetic solid in which all the atoms have their magnetic moments aligned in the same direction

computing a group of computers, functioning and administered as a unit, that are identified by sharing the same domain name on the internet

Also called: superkingdom biology the highest level of classification of living organisms. Three domains are recognized: Archaea (see archaean), Bacteria (see bacteria), and Eukarya (see eukaryote)

biochem a structurally compact portion of a protein molecule

Word Origin for domain

C17: from French domaine, from Latin dominium property, from dominus lord

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for domain

domain

[ dō-mān′ ]

n.

One of the homologous regions that make up an immunoglobulin's heavy and light chains and serve specific immunological functions.

Science definitions for domain

domain

[ dō-mān′ ]

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

noun

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British Dictionary definitions for domain

domain

noun

Word Origin for domain

Medicine definitions for domain

domain

n.

Science definitions for domain

domain