domain

noun

1
the content of a particular field of knowledge
2
people in general; especially a distinctive group of people with some shared interest
the Western world
3
(mathematics) the set of values of the independent variable for which a function is defined
4
territory over which rule or control is exercised
his domain extended into Europe
he made it the law of the land
5
a particular environment or walk of life
his social sphere is limited
it was a closed area of employment

Also useful for “domain”:Unscrambler— Rearrange the letters in “domain”