Meaning of sphere

Definition of sphere

(noun) a particular environment or walk of life; "his social sphere is limited"; "it was a closed area of employment"; "he's out of my orbit"
any spherically shaped artifact
the geographical area in which one nation is very influential
a particular aspect of life or activity; "he was helpless in an important sector of his life"
a solid figure bounded by a spherical surface (including the space it encloses)
a three-dimensional closed surface such that every point on the surface is equidistant from the center
the apparent surface of the imaginary sphere on which celestial bodies appear to be projected

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