olemus
Wiktionary:
1 any considerable and connected part of a space or surface; specifically, a tract of land or sea of considerable but indefinite extent; a country; a district; in a broad sense, a place without special reference to location or extent but viewed as an entity for geographical, social or cultural reasons

ISO 11615:
ala, eriti riigi või maailma osa, millel on määratletavad omadused, kuid mitte alati kindlad piirid
= area, especially part of a country or the world having definable characteristics but not always fixed boundaries