realm
n 1: a domain in which something is dominant; "the untroubled
kingdom of reason"; "a land of make-believe"; "the rise
of the realm of cotton in the south" [syn: {kingdom}, {land}]
2: the domain ruled by a king or queen [syn: {kingdom}]
3: 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: {domain}, {region}]