Noun

• S: (n) sphere, domain, area, orbit, field, arena (a particular environment or walk of life) "his social sphere is limited"; "it was a closed area of employment"; "he's out of my orbit"
• S: (n) domain, demesne, land (territory over which rule or control is exercised) "his domain extended into Europe"; "he made it the law of the land"
• S: (n) domain, domain of a function ((mathematics) the set of values of the independent variable for which a function is defined)
• domain category
• direct hypernym / inherited hypernym / sister term
• S: (n) world, domain (people in general; especially a distinctive group of people with some shared interest) "the Western world"
• S: (n) knowledge domain, knowledge base, domain (the content of a particular field of knowledge)