Domain vs. Region

A geographic area owned or controlled by a single person or organization.

Example: ‘The king ruled his domain harshly.’;

A field or sphere of activity, influence or expertise.

Example: ‘Dealing with complaints isn't really my domain: get in touch with customer services.’; ‘His domain is English history.’;

A group of related items, topics, or subjects.

(mathematics) The set of all possible mathematical entities (points) where a given function is defined.

The set of input (argument) values for which a function is defined.

(mathematics) A ring with no zero divisors; that is, in which no product of nonzero elements is zero.

Example: ‘integral domain’;

An open and connected set in some topology. For example, the interval (0,1) as a subset of the real numbers.

Any DNS domain name, particularly one which has been delegated and has become representative of the delegated domain name and its subdomains.

A collection of DNS or DNS-like domain names consisting of a delegated domain name and all its subdomains.

(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.

(computing) The collection of computers identified by a domain's domain names.

(physics) A small region of a magnetic material with a consistent magnetization direction.

(computing) Such a region used as a data storage element in a bubble memory.

(data processing) A form of technical metadata that represent the type of a data item, its characteristics, name, and usage.

(taxonomy) The highest rank in the classification of organisms, above kingdom; in the three-domain system, one of the taxa Bacteria, Archaea, or Eukaryota.

(biochemistry) A folded section of a protein molecule that has a discrete function.

Dominion; empire; authority.

The territory over which dominion or authority is exerted; the possessions of a sovereign or commonwealth, or the like. Also used figuratively.

Example: ‘The domain of authentic history.’; ‘The domain over which the poetic spirit ranges.’;

Landed property; estate; especially, the land about the mansion house of a lord, and in his immediate occupancy; demesne.

Ownership of land; an estate or patrimony which one has in his own right; absolute proprietorship; paramount or sovereign ownership.

the set of values which the independent variable of a function may take. Contrasted to range, which is the set of values taken by the dependent variable.

a connected set of points, also called a region.

a region within a ferromagnetic material, composed of a number of atoms whose magnetic poles are pointed in the same direction, and which may move together in a coordinated manner when disturbed, as by heating. The direction of polarity of adjacent domains may be different, but may be aligned by a strong external magnetic field.

an address within the internet computer network, which may be a single computer, a network of computers, or one of a number of accounts on a multiuser computer. The domain specifies the location (host computer) to which communications on the internet are directed. Each domain has a corresponding 32-bit number usually represented by four numbers separated by periods, as 128.32.282.56. Each domain may also have an alphabetical name, usually composed of a name plus an extension separated by a period, as worldsoul.org; the alphabetical name is referred to as a domain name.

the three-dimensional structure within an immunoglobulin which is formed by one of the homology regions of a heavy or light chain.

the field of knowledge, expertise, or interest of a person; as, he had a limited domain of discourse; I can't comment on that, it's outside my domain.

a particular environment or walk of life.

people in general; especially a distinctive group of people with some shared interest.

a particular environment or walk of life;

Example: ‘his social sphere is limited’; ‘it was a closed area of employment’; ‘he's out of my orbit’;

territory over which rule or control is exercised;

Example: ‘his domain extended into Europe’; ‘he made it the law of the land’;

the set of values of the independent variable for which a function is defined

people in general; especially a distinctive group of people with some shared interest;

Example: ‘the Western world’;

a knowledge domain that you are interested in or are communicating about;

Example: ‘it was a limited domain of discourse’; ‘here we enter the region of opinion’; ‘the realm of the occult’;

an area of territory owned or controlled by a particular ruler or government

Example: ‘the French domains of the Plantagenets’;

a specified sphere of activity or knowledge

Example: ‘the country's isolation in the domain of sport’;

a distinct subset of the Internet with addresses sharing a common suffix or under the control of a particular organization or individual.

a discrete region of magnetism in ferromagnetic material.

the set of possible values of the independent variable or variables of a function.

a distinct region of a complex molecule or structure.

Any considerable and connected part of a space or surface; specifically, a tract of land or sea of considerable but indefinite extent; a country; a district; in a broad sense, a place without special reference to location or extent but viewed as an entity for geographical, social or cultural reasons.

Example: ‘the equatorial regions’; ‘the temperate regions’; ‘the polar regions’; ‘the upper regions of the atmosphere’;

An administrative subdivision of a city, a territory, a country or the European Union.

(historical) Such a division of the city of Rome and of the territory about Rome, of which the number varied at different times; a district, quarter, or ward.

(figuratively) The inhabitants of a region or district of a country.

(anatomy) A place in or a part of the body in any way indicated.

Example: ‘the abdominal regions’;

(obsolete) Place; rank; station; dignity.

(obsolete) The space from the earth's surface out to the orbit of the moon: properly called the elemental region.

One of the grand districts or quarters into which any space or surface, as of the earth or the heavens, is conceived of as divided; hence, in general, a portion of space or territory of indefinite extent; country; province; district; tract.

Example: ‘If thence he 'scappe, into whatever world,Or unknown region.’;

Tract, part, or space, lying about and including anything; neighborhood; vicinity; sphere.

Example: ‘Philip, tetrarch of .. the region of Trachonitis.’;

The upper air; the sky; the heavens.

Example: ‘Anon the dreadful thunderDoth rend the region.’;

The inhabitants of a district.

Place; rank; station.

Example: ‘He is of too high a region.’;

the extended spatial location of something;

Example: ‘the farming regions of France’; ‘religions in all parts of the world’; ‘regions of outer space’;

a part of an animal that has a special function or is supplied by a given artery or nerve;

Example: ‘in the abdominal region’;

a large indefinite location on the surface of the Earth;

Example: ‘penguins inhabit the polar regions’;

the approximate amount of something (usually used prepositionally as in `in the region of');

Example: ‘it was going to take in the region of two or three months to finish the job’; ‘the price is in the neighborhood of $100’;

a knowledge domain that you are interested in or are communicating about;

Example: ‘it was a limited domain of discourse’; ‘here we enter the region of opinion’; ‘the realm of the occult’;

In geography, regions are areas that are broadly divided by physical characteristics (physical geography), human impact characteristics (human geography), and the interaction of humanity and the environment (environmental geography). Geographic regions and sub-regions are mostly described by their imprecisely defined, and sometimes transitory boundaries, except in human geography, where jurisdiction areas such as national borders are defined in law.