domain (
http://definr.com/domain)
n 1: 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" [syn:
sphere,
area,
orbit,
field,
arena]
2: territory over which rule or control is exercised; "his
domain extended into Europe"; "he made it the law of the
land" [syn:
demesne,
land]
3: the set of values of the independent variable for which a
function is defined [ant:
range]
4: people in general; especially a distinctive group of people
with some shared interest; "the Western world" [syn:
world]
5: a knowledge domain that you are interested in or are
communicating about; "it was a limited domain of
discourse"; "here we enter the region of opinion"; "the
realm of the occult" [syn:
region,
realm]