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Domain definition

dō-mān
domains
See word origin
Frequency:
Land belonging to one person; estate.
noun
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Field or sphere of activity or influence.

The domain of science.

noun
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(biol.) In some taxonomic systems, the highest classification category, ranking above a kingdom.
noun
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(biology) A division of organisms that ranks above a kingdom in systems of classification that are based on shared similarities in DNA sequences rather than shared structural similarities. In these systems, there are three domains: the archaea, the bacteria, and the eukaryotes.
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(biology) Any of three primary divisions of organisms, consisting of the eukaryotes, bacteria, and archaea, that rank above a kingdom in taxonomic systems based on similarities of DNA sequences.
noun
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The definition of a domain is a group of workgroups within the same company or organization that governs the ability of all the computers to communicate with other groups of computers both within and outside of the organization.

An example of a domain is the overall decision point that defines which resources on the network are accessible to a given user and keeps track of login and password information for all users within a set of workgroups in an organization.

An example of a domain is a group of Domain Name Servers, Mail Servers, Print Servers, Internet World Wide Web Servers and FTP Servers.

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(law) The land of one with paramount title and absolute ownership.
noun
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(computing) A collection of information having to do with a domain, the computers named in the domain, and the network on which the computers named in the domain reside.
noun
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The definition of a domain is the area a given person or people rules or an area of knowledge.

An example of domain is the kingdom ruled by a king.

An example of domain is a person's area of expertise, such as mathematics.

noun
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The set of all possible values of an independent variable of a function.
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(physics) A region in a ferromagnetic material within which the atoms are magnetically aligned: alignment of these regions results in the material being magnetized.
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The set of those values of an independent variable which exist for a given function.
noun
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Sphere of influence.
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In the Internet Domain Name System (DNS), the rightmost portion of the address, the domain identifies the type of entity owning or sponsoring the address. The several types of Top Level Domains (TLDs) include generic Top Level Domains (gTLDs) and country codes. If a country code is used in the address, the gTLD becomes a secondary domain. See also country code, DNS, gTLD, Internet, secondary domain, and TLD.
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A geographic area owned or controlled by a single person or organization.

The king ruled his domain harshly.

noun
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Dealing with complaints isn't really my domain: get in touch with customer services.

His domain is English history.

noun
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(mathematics) The set of all possible mathematical entities (points) where a given function is defined.
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(mathematics, topology, analysis) An open and connected set in some topology. For example, the interval (0,1) as a subset of the real numbers.
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An open connected set that contains at least one point.
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The set of all integers, or a set of elements which can be combined in the same way as the integers.
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Real estate; the ownership of such real estate. In Internet parlance, an Internet address (such as www.aol.com) to be registered with the appropriate authorities.
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noun
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(mathematics) A ring with no zero divisors; that is, in which no product of nonzero elements is zero.
noun
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(computing, Internet) A collection of DNS or DNS-like domain names consisting of a delegated domain name and all its subdomains.
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(computing) The collection of computers identified by a domain's domain names.
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(physics) A small region of a magnetic material with a consistent magnetization direction; such a region used as a data storage element in a bubble memory.
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(data processing) A form of technical metadata that represent the type of a data item, its characteristics, name, and usage.
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(biology, taxonomy) The highest rank in the classification of organisms, above kingdom; in the three-domain system, one of the taxa Bacteria, Archaea, or Eukaryota.
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(biochemistry) A folded section of a protein molecule that has a discrete function.
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A territory over which rule or control is exercised.
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A sphere of activity, influence, or knowledge.

The domain of history.

noun
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(computers) A group of networked computers that share a common communications address.
noun
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(physics) Any of numerous contiguous regions in a ferromagnetic material in which the direction of spontaneous magnetization is uniform and different from that in neighboring regions.
noun
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Supreme ownership.
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noun
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Any of three primary divisions of organisms, consisting of the eukaryotes, bacteria, and archaea, that rank above a kingdom in taxonomic systems based on similarities of DNA sequences.
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(mathematics) The set of all values that an independent variable of a function can have. In the function y = 2 x , the set of values that x (the independent variable) can have is the domain.
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(computer science) A group of networked computers that share a common communications address.
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(physics) A region in a ferromagnetic substance in which the substance is magnetized with the same polarization throughout.
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(1) In a LAN, a subnetwork made up of a group of clients and servers under the control of one security database. Dividing LANs into domains improves performance and security.
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(computing, Internet) Any DNS domain name, particularly one which has been delegated and has become representative of the delegated domain name and its subdomains.
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Territory under one government or ruler; dominion.
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Other Word Forms

Noun

Singular:
domain
Plural:
domains

Origin of domain

  • French domaine blend of Old French demaine (from Late Latin dominicum) Latin dominium property both from dominus lord dem- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Middle English demeine, demain (“rule”), Old French demeine, demaine, demeigne, domaine (“power”), (French domaine), from Latin dominium (“property, right of ownership”), from dominus (“master, proprietor, owner”). See dame, and confer demain, danger, dungeon.

    From Wiktionary

Domain Sentence Examples

  • He cannot enter Death's domain or other areas of the Immortal world without invitation.

  • She gave up her power, her domain, and her entire life for this opportunity.

  • I even gave up my power, my domain, everything.

  • Several portals glowed, and he strode across the silent domain toward the portal he needed.

  • He joined Dean at the kitchen table although Cynthia would have preferred having her private domain to herself.

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Words near domain in the Dictionary