Definition of domain in English:



  • 1An area of territory owned or controlled by a ruler or government.

    ‘the southwestern French domains of the Plantagenets’
    • ‘Morning rose on the world, from the Pacific Ocean across the vast continent of Asia, across the ancient domains of Europe, and onto New York City.’
    • ‘The domains under her control included territories in both Burgundy and the Netherlands.’
    • ‘The vast domain now had an area of nearly eleven and a half million square miles, and a population of more than a fifth of the people of the globe.’
    • ‘They are also similar in that military forces can gain advantages by controlling and exploiting these domains.’
    • ‘Despite his advanced age, he has plans to visit areas of his former domain where he is not well-liked.’
    • ‘These ancient domains of the old Burgundian empire seem to throw up a type of Frenchman more passionate in his devotion to a certain idea of France than any other.’
    • ‘The peripatetic household continued to gravitate towards the cities and towns of a ruler's domains, an urban environment providing the necessary infrastructures for court life.’
    • ‘He had made Esfahan the capital of his domains and his grandson Malik-Shah was the ruler of that city from 1073.’
    • ‘Or is the nuthouse the perfect front from which to control his gangland domain?’
    realm, kingdom, empire, dominion, province, estate, territory, land, lands, dominions
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    1. 1.1 A specified sphere of activity or knowledge.
      ‘the expanding domain of psychology’
      figurative ‘visual communication is the domain of the graphic designer’
      • ‘Sport, for the most part, is the domain of the young.’
      • ‘Finally, analyses testing the direct effects of individual stress domains on control and depressive symptoms, respectively, will be presented.’
      • ‘After dark, the street milieu is the domain of the shadowy.’
      • ‘But at any rate they are dealing with two different domains, two different areas, the epistemologic and the metaphysical.’
      • ‘On the one hand, Thompson does seem to have an encyclopedic knowledge of his subject domain, thanks in no small part to his willingness to talk to the media.’
      • ‘She calls for a new understanding of family, one that does not separate a public masculine world of paid employment from a private feminine domain of care.’
      • ‘Inside our head there are various departments, compartments, areas and domains that contain information…’
      • ‘In fact, this may be one domain in which a problem exists for which there is no useful cure: the genie might simply be out of the bottle.’
      • ‘Moreover, particularly in developing countries, the use of personal computers had yet to be adapted to a legal domain.’
      • ‘In this domain, as with so much modern technology, people are not just consumers; they're producers.’
      • ‘Here, I have a privilege of working with people who have expertise in their own domain areas for more than a decade.’
      • ‘You can look at the world as they would see it, and that's a very non-personal domain of awareness.’
      • ‘If hegemony is not consensual in this new domain, it won't long last.’
      • ‘Carol listened as the girls' shoes clomped down the stairs leading to the basement - Nicole's domain.’
      • ‘This is the domain of theology, cosmology and psychology.’
      • ‘All of this occurred essentially at once - no one domain drove the others.’
      • ‘‘We go into the domain of controls, locks, throws and take-downs,’ he says.’
      • ‘I have never had the luxury of living and thinking in an exclusively theoretical cinematic domain.’
      • ‘The one area where there is some similarity between the two wars is the domain of public opinion.’
      • ‘He learned the technique, customarily the exclusive domain of women, from his mother during a visit home to Mali in 1987.’
      field, area, arena, sphere, discipline, sector, section, region, province, world
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    2. 1.2Physics A discrete region of magnetism in ferromagnetic material.
      • ‘Ferromagnetic materials consist of tiny individual domains in which the magnetic moments of all the component atoms or molecules point in the same direction.’
      • ‘The larger the concentration of domains and ions, the more charges can be displaced and snap back.’
      • ‘The magnetic domains will remain aligned until randomized by thermal agitation or by some other external force which can do work in rotating the domains within the material.’
      • ‘The magnetic domains are essentially tiny magnets, each with a north and south pole.’
      • ‘By altering the microstructure, we can create weak links between the ferromagnetic domains that should lead to new and interesting electronic networks.’
    3. 1.3Computing A distinct subset of the Internet with addresses sharing a common suffix or under the control of a particular organization or individual.
      • ‘We noted at the time that despite hundreds of legal letters to domain holders, only one of these cases had proceeded to court, and that was settled.’
      • ‘If the people with those accounts didn't bother to change their e-mail address when the domain expired, you can collect their passwords.’
      • ‘Thus, identity indirectly controls the list of domains you may enter.’
      • ‘Those that do still exist don't pay anything for their domains and have permanent control over them.’
      • ‘The process for deciding ownership of Internet domains is flawed, biased and in drastic need of reform, an expert in Internet and e-commerce law has concluded in a study released today.’
    4. 1.4Mathematics The set of possible values of the independent variable or variables of a function.
      • ‘One of the first papers which he published after arriving in the United States was on the Euclidean algorithm in principal ideal domains.’
      • ‘In what follows, we will apply results about centroids of domains to unions of curves or line segments.’
      • ‘Within each of these domains it is possible to conceptualize both static and dynamic variables.’
      • ‘Ten separate regression analyses were carried out, one regression analysis corresponding to each of the ten domains of the independent variables.’
      • ‘In this case, this is not a problem, since the domain of the sine function is all real numbers.’


Late Middle English (denoting heritable or landed property): from French domaine, alteration (by association with Latin dominus ‘lord’) of Old French demeine ‘belonging to a lord’ (see demesne).