domain

noun
do·main | \dō-ˈmān, də-\

Definition of domain 

1 law

a : complete and absolute (see absolute sense 3) ownership of land our highways and roads have been in the domain of state and local governments— T. H. White b. 1915 — compare eminent domain

b : land so owned

2 : a territory over which dominion (see dominion sense 2) is exercised The forest is part of the king's domain.

3 : a region distinctively marked by some physical feature a domain of rushing streams, tall trees, and lakes

4 : a sphere (see sphere sense 4b) of knowledge, influence, or activity the domain of biblical scholarship outside the domain of city police

5 mathematics : the set of elements (see element sense 2b(3)) to which a mathematical or logical variable is limited specifically : the set on which a function (see function entry 1 sense 5a) is defined

6 physics : any of the small randomly oriented regions of uniform magnetization in a ferromagnetic substance

7 mathematics : integral domain

8 biology : the highest taxonomic category in biological classification ranking above the kingdom (see kingdom sense 4b)

9 biochemistry : any of the three-dimensional subunits of a protein that are formed by the folding of its linear peptide chain and that together make up its tertiary (see tertiary entry 1 sense 3c) structure

10 computers : a subdivision of the Internet consisting of computers or sites usually with a common purpose (such as providing commercial information) and denoted in Internet addresses by a unique abbreviation (such as com for commercial sites or gov for government sites) The domain ca is used for sites located in Canada. also : domain name Our domain is Merriam-Webster.com.

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Examples of domain in a Sentence

The forest is part of the king's domain. My sister is the math expert in the family, but literature is my domain. Childcare is no longer solely a female domain.
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Recent Examples on the Web

Though light lagers have traditionally been the domain of Big Beer since the 1970s, craft breweries have increasingly waded into the realm of easy-drinking accessibility. Josh Noel, chicagotribune.com, "Can craft brewers make good light beer? Our tasting pits them against Bud, Miller, Coors, more," 12 July 2018 Some of the trabocchi are a few centuries old and each was once the domain of individual fishing families. David Farley, WSJ, "Where to Feast on Italy’s Freshest Seafood? These Historic Piers," 10 July 2018 Prank calls have long been the domain of of radio shock jocks and bored juveniles. Kevin Kelleher, Fortune, "'Stuttering John' Prank Call to Trump May Be Funny, but the White House's Lax Communications Security Is Not," 29 June 2018 If bars had previously been the domain of men, places that respectable women wouldn’t be seen, new social mores suddenly changed that. Esther Mobley, SFChronicle.com, "SF’s Interval puts the fern bar on a cocktail menu," 20 June 2018 While the number of migrants has fallen sharply in recent years, public anger has not, and the question remains whether Europe can preserve its borderless domain and, in a sense, its reason for being. Steven Erlanger, New York Times, "For Europe, Cutting the Flow of Migrants Challenges Basic Ideals," 5 July 2018 Ferdinand survived, re-establishing his domains as the Kingdom of the Two Sicilies, but remained an Austrian puppet. Matthew Guerrieri, BostonGlobe.com, "Mozart for an era of political machinations," 28 June 2018 And especially since the 1980s, pop has been the domain of a particular type of entertainer: a virtuoso performer, visual artist, cultural maven, pop arbiter, and chart baron known as a pop star. Dj Louie Xiv, Vanities, "Has 2018 Killed the Pop Star?," 22 June 2018 Mr Sharif returned to power in 2013 eager to assert civilian control of foreign and security policy, which the army regards as its exclusive domain. The Economist, "Pakistan’s army is using every trick to sideline Nawaz Sharif," 21 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'domain.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of domain

15th century, in the meaning defined at sense 1a

History and Etymology for domain

alteration of Middle English demayne, from Anglo-French demeine, from Latin dominium, from dominus — see dominate

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Learn More about domain

Dictionary Entries near domain

dom

-dom

Domagk

domain

domainal

domaine

domain name

Phrases Related to domain

the public domain

Statistics for domain

Last Updated

6 Oct 2018

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Time Traveler for domain

The first known use of domain was in the 15th century

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More Definitions for domain

domain

noun

English Language Learners Definition of domain

: the land that a ruler or a government controls

: an area of knowledge or activity

computers : a section of the Internet that is made up of computers or sites that are related in some way (such as by use or source)

domain

noun
do·main | \dō-ˈmān \

Kids Definition of domain

1 : land under the control of a ruler or a government

2 : a field of knowledge or activity the domain of science

domain

noun
do·main | \dō-ˈmān, də- \

Medical Definition of domain 

1 : any of the three-dimensional subunits of a protein that together make up its 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 immunoglobulin light chains have two domains and heavy chains have four or five domains, depending on classJournal of the American Medical Association

2 : the highest taxonomic category in biological classification ranking above the kingdom

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