1. (noun) sphere, domain, area, orbit, field, arena
a particular environment or walk of life
Synonyms: study, compass, land, heavens, sphere, demesne, knowledge base, field of study, plain, empyrean, welkin, ambit, sector, range, scope, eye socket, field of operations, country, subject field, reach, flying field, subject area, vault of heaven, celestial sphere, expanse, area, force field, line of business, sphere of influence, theater of operations, battlefield, theatre of operations, orbital cavity, bailiwick, stadium, playing area, field of view, champaign, scene of action, theatre, battleground, airfield, knowledge domain, cranial orbit, world, electron orbit, playing field, theater, discipline, region, firmament, field of operation, field of force, sports stadium, bowl, landing field, subject, domain, field of honor, arena, surface area, domain of a function, field, field of battle, orbit, celestial orbit, athletic field
2. (noun) domain, demesne, land
territory over which rule or control is exercised
Synonyms: commonwealth, res publica, world, landed estate, ground, orbit, knowledge domain, farming, estate, nation, kingdom, solid ground, arena, state, dry land, knowledge base, realm, land, sphere, country, soil, area, acres, demesne, earth, field, body politic, terra firma, domain of a function, domain
3. (noun) domain, domain of a function
(mathematics) the set of values of the independent variable for which a function is defined
Synonyms: knowledge domain, sphere, demesne, arena, domain of a function, area, domain, world, knowledge base, field, orbit, land
4. (noun) world, domain
people in general; especially a distinctive group of people with some shared interest
Synonyms: globe, reality, humankind, public, human race, orbit, earthly concern, man, cosmos, humanity, world, creation, macrocosm, universe, knowledge base, worldly concern, area, populace, sphere, knowledge domain, human beings, mankind, existence, land, humans, demesne, earth, field, arena, domain of a function, domain
5. (noun) knowledge domain, knowledge base, domain
the content of a particular field of knowledge
Synonyms: knowledge domain, demesne, domain, arena, domain of a function, sphere, world, knowledge base, field, orbit, land, area
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Synonyms and Antonyms of domain 
