sphere (
http://definr.com/sphere)
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:
domain,
area,
orbit,
field,
arena]
2: any spherically shaped artifact
3: the geographical area in which one nation is very
influential [syn:
sphere of influence]
4: a particular aspect of life or activity; "he was helpless in
an important sector of his life" [syn:
sector]
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},
empyrean,
firmament,
heavens, {vault of
heaven},
welkin]