Sphere - Definition

n 1: 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" [syn: sphere, domain, area,
orbit, field, arena]
2: any spherically shaped artifact
3: the geographical area in which one nation is very influential
[syn: sphere, sphere of influence]
4: a particular aspect of life or activity; "he was helpless in
an important sector of his life" [syn: sector, sphere]
5: a solid figure bounded by a spherical surface (including the
space it encloses)
6: a three-dimensional closed surface such that every point on
the surface is equidistant from the center
7: the apparent surface of the imaginary sphere on which
celestial bodies appear to be projected [syn: celestial
sphere, sphere, empyrean, firmament, heavens, vault
of heaven, welkin]