UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/dəʊˈmeɪn/US:USA pronunciation: IPA and respellingUSA pronuncation: IPA/doʊˈmeɪn/ ,USA pronunciation: respelling(dō mān)

WordReference Random House Learner's Dictionary of American English © 2020
do•main /doʊˈmeɪn/USA pronunciation   n. [countable]
  1. a field or area of thought, etc;
    area of interest:He works in the domain of public health.
  2. Governmentthe territory governed by a ruler or government:The domains stretched for hundreds of miles in every direction.

WordReference Random House Unabridged Dictionary of American English © 2020
do•main  (dō mān),USA pronunciation n. 
  1. a field of action, thought, influence, etc.:the domain of science.
  2. Governmentthe territory governed by a single ruler or government;
  3. a realm or range of personal knowledge, responsibility, etc.
  4. a region characterized by a specific feature, type of growth or wildlife, etc.:We entered the domain of the pine trees.
  5. Lawland to which there is superior title and absolute ownership.
  6. Mathematics
    • the set of values assigned to the independent variables of a function.
    • Mathematicsregion (def. 11a).
  7. [Physics.]one of many regions of magnetic polarity within a ferromagnetic body, each consisting of a number of atoms having a common polarity, and collectively determining the magnetic properties of the body by their arrangement.
  8. Crystallographya connected region with uniform polarization in a twinned ferroelectric crystal.
do•mani•al, adj. 
  • Late Latin dominicum, noun, nominal use of neuter of Latin dominicus of a master, equivalent. to domin(us) lord + -icus -ic
  • French domaine, alteration, by association with Latin dominium dominium, of Old French demeine
  • 1595–1605

domain, +n. [Computers.]
  1. a group of computers and devices on a network that are administered under the same protocol.
  2. the top level in a domain name, indicating the type of organization or geographical location and officially designated in the suffix, as .com for commercial enterprises in the U.S.

Collins Concise English Dictionary © HarperCollins Publishers::
domain /dəˈmeɪn/ n
  1. land governed by a ruler or government
  2. land owned by one person or family
  3. a field or scope of knowledge or activity
  4. a region having specific characteristics or containing certain types of plants or animals
  5. Austral NZ a park or recreation reserve maintained by a public authority, often the government
  6. the absolute ownership and right to dispose of land
  7. the set of values of the independent variable of a function for which the functional value exists
  8. another term for universe of discourse: domain of quantification
  9. range of significance (esp in the phrase domain of definition)
  10. Also called: magnetic domain one of the regions in a ferromagnetic solid in which all the atoms have their magnetic moments aligned in the same direction
  11. a group of computers, functioning and administered as a unit, that are identified by sharing the same domain name on the internet

  12. Also called: superkingdom the highest level of classification of living organisms. Three domains are recognized: Archaea (see archaean), Bacteria (see bacteria), and Eukarya (see eukaryote)
  13. a structurally compact portion of a protein molecule
Etymology: 17th Century: from French domaine, from Latin dominium property, from dominus lord
'domain' also found in these entries:
Collocations: [buy, register, choose] a domain name, the domain name is [not available, already taken], [internet, website] domains, more...

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