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

This intrusion of the union into the domains of the state government has been fiscally mapped by Pinaki Chakraborty at the national institute of public finance and policy. Shoaib Daniyal, Quartz India, "Various cesses levied by the Modi government are squeezing Indian state budgets," 23 Aug. 2019 The journalist wonders how many hits to the head Frazier sustained over the course of four years at Nebraska, faking that ball to the fullback up the middle and hurling himself around the edge into the domain of hungry linebackers and safeties. Los Angeles Times, "A kid who never outgrew his love for college football got the best job in the world," 30 July 2019 Finally: The last S&P 500 company with an all-male board of directors has added a woman to its ranks, marking a milestone in the push to diversify the corporate boardroom beyond the domain of men. Aimee Picchi, CBS News, "The last S&P 500 company with an all-male board adds a woman," 25 July 2019 But due to poor oversight, the domain for the website (mdproblemgambling.com) for the deterrence program lapsed and the site was taken over with promotional material for casinos and Las Vegas. Luke Broadwater, baltimoresun.com, "Maryland’s government created a website to deter gambling. It ended up promoting casinos.," 16 July 2019 Dusk leaves the Cité empty except for the watchmen in the domains of God and the law, the temporary inhabitants at the hospital, and the residents of the two clusters of habitation at the two ends of the island. Bruce Dale, National Geographic, "Adored, neglected, and restored: A 1968 Nat Geo feature explored Notre Dame," 17 Apr. 2019 He and his colleagues have been working on extending the theory to other domains of cognition. Jordana Cepelewicz, WIRED, "How the Brain Keeps Its Memories in the Right Order," 17 Feb. 2019 These features were once solely in the domain of expensive luxury cars. Jonathan Elfalan, Edmunds, USA TODAY, "Advanced driver aids aren't just for luxury cars, Edmunds says," 6 Apr. 2018 This route lies within the domains of science – the very same science that produced chemical weapons in the first place. Ian Haydon, Scientific American, "Enzymes versus Nerve Agents: Designing Antidotes for Chemical Weapons," 11 Apr. 2017

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

8 Sep 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
: 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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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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