1. A territory over which rule or control is exercised.
2. A sphere of activity, concern, or function; a field: the domain of history. see synonyms at field.
3. 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.
4. law the land of one with paramount title and absolute ownership.
5. law public domain.
6. mathematics the set of all possible values of an independent variable of a function.
7. mathematics an open connected set that contains at least one point.
8. biology any of three primary divisions of living systems, consisting of the eukaryotes, bacteria, and archaea, that rank above a kingdom in taxonomic systems that are based on similarities of dna sequences.
9. computer science A group of networked computers that share a common communications address.

1. A geographic area owned or controlled by a single person or organization.
2. A sphere of influence.
3. A group of related items, topics, or subjects.
4. the set of all possible mathematical entities (points) where a given function is defined.
5. an open and connected set in some topology. for example, the interval (0,1) as a subset of the real numbers.
6. any dns domain name, particularly one which has been delegated and has become representative of the delegated domain name and its subdomains
7. A collection of dns or dns-like domain names consisting of a delegated domain name and all its subdomains
8. 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
9. the collection of computers identified by a domain's domain names
10. A small magnetized area of a bubble memory storing one bit, a bubble.
11. in the three-domain system, the highest rank in the classification of organisms, above kingdom; in other taxonomic systems, a similarly high rank
12. in the three-domain system, one of three taxa at that rank: bacteria, archaea, or Eukaryota.
13. A folded section of a protein molecule that has a discrete function

1. dominion; empire; authority.
2. the territory over which dominion or authority is exerted; the possessions of a sovereign or commonwealth, or the like. also used figuratively.
3. landed property; estate; especially, the land about the mansion house of a lord, and in his immediate occupancy; demesne.
4. ownership of land; an estate or patrimony which one has in his own right; absolute proprietorship; paramount or sovereign ownership.
5. the set of values which the independent variable of a function may take. contrasted to
6. a connected set of points, also called a region.
7. 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.
8. 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.
9. the three-dimensional structure within an immunoglobulin which is formed by one of the homology regions of a heavy or light chain.
10. the field of knowledge, expertise, or interest of a person.
11. a particular environment or walk of life.
12. people in general; especially a distinctive group of people with some shared interest.

1. dominion; province of action; range or extent of authority: as, to trench on one's domain by interference.
2. the territory over which dominion is exercised; the territory ruled over by a sovereign, or under the government of a commonwealth: as, the domains of great britain.
3. an estate in land; landed property.
4. the land about the mansion-house of a lord, and in his immediate occupancy.
5. in law, ownership of land; immediate or absolute ownership; permanent or ultimate ownership. in the last two senses the word coincides with demain, demesne.
6. the range or limits of any department of knowledge or sphere of action, or the scope of any particular subject: as, the domain of religion, science, art, letters, agriculture, commerce, etc.; the judicial domain.
7. in logic, the breadth, extension, circuit, or sphere of a notion.
8. in the united states, the lands owned by the federal government or by a state; the public lands held for sale or reserved for specific uses.
9. in mathematics: A set of numbers when the sums, differences, products, and quotients of any numbers in the set (excluding only the quotients of division by 0) always yield as results numbers belonging to the set.
10. the space within which a given function is developable in a series in powers of z–a: termed the domain of the point, z = adjective
11. in function-theory, the region of the z-plane within a circle about a as center with any radius less than the distance from a to the nearest critical point: called the domain of its center a.

1. territory over which rule or control is exercised
2. the content of a particular field of knowledge
3. people in general; especially a distinctive group of people with some shared interest
4. a particular environment or walk of life
5. (mathematics) the set of values of the independent variable for which a function is defined