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

An entry in the domain’s authoritative name servers pointed to the IP address 74.207.229.178. Dan Goodin, Ars Technica, "When a network intel provider’s domain serves fraudulent content, something is wrong," 15 Nov. 2018 That’s more than 2% of all the farmland in the U.S. and AgriEdge’s domain is growing at over 25% a year. Shawn Tully, Fortune, "This Agriculture Giant Is Bringing in the Drones to Modernize Farming From Cornfields to Vineyards," 19 June 2018 Both websites have since been removed by their domain hosts. Eli Rosenberg, Washington Post, "He’s pro-incest, pedophilia, and rape. He’s also running for Congress from his parents’ house.," 1 June 2018 Both sites were shut down by their domain hosts on Tuesday. William Cummings, USA TODAY, "Nathan Larson is a pedophile and a white supremacist. And he's running for Congress," 1 June 2018 The twiddling acoustic score that sounds like a generic public-domain tune doesn't help. Katie Walsh, latimes.com, "Comedy 'Alex & the List" delivers neither romance nor laughs," 3 May 2018 Media, using RT’s domain registration address in 2016. Ben Collins /, NBC News, "Russian propaganda evades YouTube's flagging system with BuzzFeed-style knockoffs," 19 Apr. 2018 The company's website went online in July of last year, domain registration records show. Gordon R. Friedman, OregonLive.com, "Nike exec stakes claim to bring pro baseball to Portland," 16 Apr. 2018 The company is shifting to another domain, Workplace.com, in hopes that people will stop associating so closely with the company that has lately become known for its data privacy issues. Casey Newton, The Verge, "Facebook political ad tools are ripe for trolling," 1 Nov. 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

Statistics for domain

Last Updated

13 Jan 2019

Look-up Popularity

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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More from Merriam-Webster on domain

Rhyming Dictionary: Words that rhyme with domain

Thesaurus: All synonyms and antonyms for domain

Spanish Central: Translation of domain

Nglish: Translation of domain for Spanish Speakers

Britannica English: Translation of domain for Arabic Speakers

Britannica.com: Encyclopedia article about domain

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