domain
Language: English
Part of speech: noun
Pronunciation: ipa: /dəʊˈmeɪn/
ipa: /dəˈmeɪn/
ipa: /doʊˈmeɪn/
ipa: /dəˈmeɪn/
ipa: /dəʉˈmæɪn/
ipa: /dəˈmæɪn/
note: Indic
ipa: /ɖoˈmeːn/
rhymes: -eɪn
homophone: demesne
Forms: form: domains
Etymology: From Middle English demayne, demain (“rule”), from Old French demeine, demaine, demeigne, domaine (“power”), (French domaine), from Latin dominium (“property, right of ownership”), from dominus (“master, proprietor, owner”). See dame, and compare demain, danger, dungeon. Doublet of demesne, domino.
Senses: examples: text: The king ruled his domain harshly.
text: Bears and other ferocious beasts resented man's intrusion into their domain; so, too, did the Blackfoot Indians and other tribes, whose savage hostility was a constant menace to the lives of the toiling engineers.
ref: 1954 February, Trevor Holloway, “Canada's Transcontinental Routes”, in Railway Magazine, page 128:
text: Farmers account for just 1.5% of the British population, but the size of their domain – 71% of the country’s surface area is classified as farmland – has given them power over the public imagination.
ref: 2020 February 25, Christopher de Bellaigue, “The end of farming?”, in The Guardian:
text: A blinded hermit in oblivion, disgraced
Like Odysseus lost in Poseidon's endless domain
In a realm devoid ov solace, I roam
ref: 2022, “Ov My Herculean Exile”, in Nergal, Tomasz Wróblewski (lyrics), Behemoth (music), Opvs Contra Natvram, performed by Behemoth:
glosses: A geographic area owned or controlled by a single person or organization.
examples: text: Dealing with complaints isn't really my domain: get in touch with customer services.
text: His domain is English history.
text: When examining studies that assess independent living and social skills—key areas of focus in adulthood for individuals with ASD—it is observed that most research evaluates only one of these domains, either activities of daily living or social functioning.
ref: 2025 August 13, Müjdat Erarkadaş, Kübra Özmeral Erarkadaş, Şahika Gülen Şişmanlar, “Autism Spectrum Disorder Beyond Childhood: A Comprehensive Assessment of Activities of Daily Living and Social Functioning in Turkish Adults.”, in Journal of Autism and Developmental Disorders, →DOI:
glosses: A field or sphere of activity, influence or expertise.
examples: text: Some of the most beautiful and thus appealing physical theories, including quantum electrodynamics and quantum gravity, have been dogged for decades by infinities that erupt when theorists try to prod their calculations into new domains. Getting rid of these nagging infinities has probably occupied far more effort than was spent in originating the theories.
ref: 2012 January 23, Michael Riordan, “Tackling Infinity”, in American Scientist, volume 100, number 1, archived from the original on 30 Apr 2013, page 86:
glosses: A group of related items, topics, or subjects.
topics: mathematics
sciences
set-theory
glosses: The set of input (argument) values for which a function is defined.
topics: mathematics
sciences
set-theory
glosses: The set of input (argument) values for which a function is defined.
The set A; The subset of A consisting of elements a of A such that there exists an element b in B with (a,b) in R.
raw_tags: of a binary relation R between A and B
topics: mathematics
sciences
hyponyms: integral domain
glosses: A ring with no zero divisors; that is, in which no product of nonzero elements is zero.
topics: mathematical-analysis
mathematics
sciences
topology
glosses: An open and connected set in some topology. For example, the interval (0,1) as a subset of the real numbers.
examples: 2000, BIND 9 Administrator Reference Manual (9.3.2), Internet Software Consortium https://web.archive.org/web/20060619063455/http://www.bind9.net/manual/bind/9.3.2/Bv9ARM.ch01.html
Every name in the DNS tree is a domain, even if it is terminal, that is, has no subdomains.
topics: computing
engineering
mathematics
natural-sciences
physical-sciences
sciences
glosses: Any DNS domain name, particularly one which has been delegated and has become representative of the delegated domain name and its subdomains.
topics: computing
engineering
mathematics
natural-sciences
physical-sciences
sciences
glosses: A collection of DNS or DNS-like domain names consisting of a delegated domain name and all its subdomains.
topics: computing
engineering
mathematics
natural-sciences
physical-sciences
sciences
glosses: 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.
topics: computing
engineering
mathematics
natural-sciences
physical-sciences
sciences
glosses: The collection of computers identified by a domain's domain names.
topics: natural-sciences
physical-sciences
physics
glosses: A small region of a magnetic material with a consistent magnetization direction.
topics: computing
engineering
mathematics
natural-sciences
physical-sciences
sciences
glosses: Such a region used as a data storage element in a bubble memory.
examples: text: A characteristic of a field. A data domain specifies a data type and applies the minimum and maximum values allowed and other constraints.
ref: a. 2013, IBM, “IBM Terminology - terms D”, in 'IBM Software|Globalization|Terminology', retrieved 29 Dec 2013:
qualifier: data processing
glosses: A form of technical metadata that represent the type of a data item, its characteristics, name, and usage.
topics: biology
natural-sciences
taxonomy
glosses: The highest rank in the classification of organisms, above kingdom; in the three-domain system, one of the taxa Bacteria, Archaea, or Eukaryota.
topics: biochemistry
biology
chemistry
microbiology
natural-sciences
physical-sciences
glosses: A folded section of a protein molecule that has a discrete function; the equivalent section of a chromosome.
topics: geography
geology
natural-sciences
glosses: An area of more or less uniform mineralization.
Synonyms: sense: geographic area
word: demesne
sense: where a function is defined
word: domain of definition
sense: collection of DNS names
word: domain name
sense: collection of DNS names
word: hostname
sense: taxonomic rank
word: dominium
Hyponyms: application domain
source domain
subdomain
target domain
top-level domain
Derived terms: antidomain
Bézout domain
bidomain
biodomain
chromodomain
cross-domain
cytodomain
data domain
Dedekind domain
didomain
domainal
domained
domainer
domain hack
domaining
domain-joined
domain kiting
domainless
domain logic
domain name
domain name server
domain name service
domain of convergence
domain of discourse
domainogram
domainome
domain-specific
domain-specific language
domain tasting
domain theory
domain wall
domainwide
ecodomain
ectodomain
eminent domain
endodomain
Euclidean domain
exodomain
ferroelectric domain
flavodomain
flexodomain
frequency domain
generic top-level domain
glycodomain
heterodomain
homeodomain
interdomain
intradomain
juxtadomain
macrodomain
megadomain
microdomain
mid-domain effect
minidomain
monodomain
multidomain
naked domain
nanodomain
Noetherian domain
nondomain
oncodomain
ordered integral domain
phosphodomain
polydomain
power domain
principal ideal domain
prodomain
protein domain
pseudodomain
public domain
second-level domain
superdomain
supradomain
synchronization domain
tetradomain
time domain
time-domain analysis
time-domain averaging
time-domain electromagnetic method
time domain electromagnetics
time-domain reflectometer
time-domain reflectometry
transdomain
unique factorization domain
value domain
vanity domain
Related terms: DNS
dominate
dominion
domino