domain

noun
do·​main | \ dō-ˈmān How to pronounce domain (audio) , 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 But in this year, when all of us have become budding epidemiologists — weighing the risk of shopping trips, tracking hospitalization rates — those words jumped from the restricted domain of hospitals and research labs to home, Zoom calls and texts. Deborah Netburn, Los Angeles Times, "From COVID to curbside, 2020 changed our vocabulary too," 28 Dec. 2020 In this third domain, in particular, the Chinese vaccine developers found themselves at a major disadvantage. Hilda Bastian, Wired, "The Race for a Covid Vaccine Was More About Luck Than Tech," 23 Dec. 2020 Holidays aside and up until the point of going to university, my main dressing up domain though was my bedroom. Rosalind Jana, refinery29.com, "Celebrate Dressing Up For The Holidays — Even With Nowhere To Go," 21 Dec. 2020 That’s in the domain of the companies that sponsor these applications. Tanya Lewis, Scientific American, "FDA Commissioner Says Vaccine Approval Process Will Be Transparent and Guided by Data," 10 Dec. 2020 The Town of Black Brook town board, which has domain over the hamlet, voted unanimously to not change the name, Jon Douglass, supervisor for the Town of Black Brook, told CNN. Taylor Romine, CNN, "The New York town of Swastika votes to keep its name," 23 Sep. 2020 In Latin America the lessons go well beyond the domain of infectious diseases to the realm of all-out government failure. Mary Anastasia O’grady, WSJ, "Peru and Brazil: Stay Home and Starve," 20 Sep. 2020 Recreational sales began across the state in December 2019, with the exception of about 1,400 communities that opted out of allowing such sales in their domain. Amy Huschka, Detroit Free Press, "Watch live at 2: Mayor Mike Duggan update on Detroit recreational marijuana licenses," 10 Dec. 2020 Many anthropologists and archeologists are uneasy about the incursion of genomics into their domain and suspicious of its brash certainties. Douglas Preston, The New Yorker, "The Skeletons at the Lake," 7 Dec. 2020

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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Time Traveler for domain

Time Traveler

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

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Statistics for domain

Last Updated

11 Jan 2021

Cite this Entry

“Domain.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/domain. Accessed 22 Jan. 2021.

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More Definitions for domain

domain

noun
How to pronounce domain (audio)

English Language Learners Definition of domain

: the land that a ruler or a government controls
: an area of knowledge or activity
: 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 How to pronounce domain (audio) \

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- How to pronounce domain (audio) \

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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