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"
territory over which rule or control is exercised; "his domain extended into Europe"; "he made it the law of the land"
(mathematics) the set of values of the independent variable for which a function is defined
people in general; especially a distinctive group of people with some shared interest; "the Western world"
the content of a particular field of knowledge
