Meaning of SPHERE in English

SPHERE

/ sfɪə(r); NAmE sfɪr/ noun

1.

( geometry ) a solid figure that is completely round, with every point on its surface at an equal distance from the centre

2.

any object that is completely round, for example a ball

3.

an area of activity, influence or interest; a particular section of society

SYN domain :

the political sphere

This area was formerly within the sphere of influence of the US.

He and I moved in totally different social spheres.

4.

-sphere (in nouns) a region that surrounds a planet, especially the earth :

ionosphere

atmosphere

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WORD ORIGIN

Middle English : from Old French espere , from late Latin sphera , earlier sphaera , from Greek sphaira ball.

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.