Meaning of SPHERE in English
/ sfɪə(r); NAmE sfɪr/ noun
( geometry ) a solid figure that is completely round, with every point on its surface at an equal distance from the centre
any object that is completely round, for example a ball
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.
-sphere (in nouns) a region that surrounds a planet, especially the earth :
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. 2005