sphere; circle; range; category
(being) within range (radio, commuting, etc.); (being) within the sphere (e.g. of influence)
(being) out of range (e.g. mobile network, radar, missiles); (being) out of contention; (being) beyond influence
safety zone; buffer (e.g. against defeat)
one's daily milieu; neighbourhood; neighborhood; zone of life; sphere of life
the capital city (often Tokyo) area (typically within 50 km of city's centre) (center)
economic bloc; ecosystem (of services, goods, etc. within a company or consortium)
English-speaking world; English-speaking countries; Anglosphere
within the sphere of influence (of)
outside Earth's atmosphere; outer space; exoatmosphere; exo-atmosphere
within Earth's atmosphere; inner space
gravitational sphere (of a celestial body); gravitational field
Arctic Circle; the Arctic
urban area; metropolitan area; metropolitan region
greater metropolitan area; megalopolis; conurbation
Greater East Asia Co-Prosperity Sphere
communist bloc; Iron Curtain
business region; marketing area; commercial sphere; trading area; region in which a business operates
emphasis mark (used in Japanese text in a way similar to underlining)
air defense identification zone; ADIZ
gravitational field (of a celestial body); sphere of gravitation; gravisphere
Islamic world; Muslim world
Antarctic Circle; the Antarctic
German-speaking countries; German language sphere
French-speaking world; francophone world; francophonie
countries where Chinese characters are used or were historically used
sphere (e.g. of knowledge, influence)
eurozone; euro zone; euro area
out of the range of communication
public sphere; public domain
Greater China (incl. Hong Kong, Macao, Taiwan and sometimes Singapore)
sinophone world; Chinese-speaking world
Spanish-speaking world; Spanish-speaking countries
kanji cultural sphere; countries where Chinese characters are used or were historically used
center versus periphery theory
Coordination Committee on Multilateral Export Controls
(having a) good chance of being elected (winning) (in an election)
non-English-speaking world; non-Anglosphere
hour circle; circle of declination
great circle sailing route
biosphere reserve (UNESCO)
traffic area; traffic block
harm zone; people who will suffer the negative effects of new public facilities, infrastructure, etc. (e.g. pollution)
member states of the former Soviet bloc
beneficiary zone; people who will enjoy the benefits of new public facilities, infrastructure, etc.
polar stratospheric cloud
countries that do not use Chinese characters in their writing; non-kanji countries
Grothendieck's Galois theory