DOMAIN

/dəʊˈmeɪn/ ► audio Scrabble 9 Words With Friends 11

Definition

noun a particular environment or walk of life. — synonyms: sphere, area, orbit, field, arena
noun territory over which rule or control is exercised. — synonyms: demesne, land
noun (mathematics) the set of values of the independent variable for which a function is defined. — synonyms: domain_of_a_function
noun people in general. — synonyms: world
noun the content of a particular field of knowledge. — synonyms: knowledge_domain, knowledge_base

“The king ruled his domain harshly.”
“Dealing with complaints isn't really my domain: get in touch with customer services.”