sphere

US /sfɪr/
UK /sfɪr/
"sphere" picture
1.

a round solid figure, or its surface, with every point on its surface equidistant from its center

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The Earth is approximately a sphere.
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The artist created a perfect glass sphere.
:
globeballorb
2.

an area of activity, interest, or expertise

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He is an expert in the sphere of international relations.
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Her influence extends beyond her immediate sphere.
:
domainrealmfieldareaprovince