Meanings

the atmosphere

outer atmosphere

one's daily milieu

sphere of influence

emphasis mark (used in Japanese text in a way similar to underlining)

out of the range of communication

scoring position

English-speaking world

gravitational field (of a celestial body)

Coordination Committee on Multilateral Export Controls

business region

safety zone

within the sphere of influence (of)

(having a) good chance of being elected

sphere (e.g. of knowledge, influence)

category theory

Soviet bloc

former Soviet bloc

member states of the former Soviet bloc

Chinese-character cultural sphere