demesne

1 a part or portion having no fixed boundaries <the vast and frozen demesne of the northern tundra> Synonyms area, region, field, zoneRelated Words corner, section; locale, locality, location, locus, place, point, position, site, space, spot

2 a region of activity, knowledge, or influence <the view that the issue is not in the demesne of the courts and is something that should be decided by the state legislature> Synonyms area, arena, bailiwick, barony, business, circle, field, department, discipline, domain, element, fief, fiefdom, firmament, front, game, kingdom, line, precinct, province, realm, specialty, sphere, terrain, walkRelated Words frontier; study, subject; territory, turf; occupation, profession, pursuit, racket, vocation; ambit, amplitude, breadth, compass, confine, dimension(s), extent, ken, reach, scope, sweep, width; subfield, subspecialty

3 the area around and belonging to a building <the mansion's huge demesne covers more than 100 acres> Synonyms ground, park, premises (also premisses), yardRelated Words acres, estate, land, lot, parcel, plot, property, real estate, realty; campus; backyard, churchyard, dooryard, schoolyard; close, enclosure (also inclosure), garden, garth, plaza