noun a particular environment or walk of life.
— synonyms: domain, area, orbit, field, arena
noun any spherically shaped artifact.
noun the geographical area in which one nation is very influential.
— synonyms: sphere_of_influence
noun a particular aspect of life or activity.
— synonyms: sector
noun a solid figure bounded by a spherical surface (including the space it encloses).
noun a three-dimensional closed surface such that every point on the surface is equidistant from the center.
noun the apparent surface of the imaginary sphere on which celestial bodies appear to be projected.
— synonyms: celestial_sphere, empyrean, firmament, heavens, vault_of_heaven, welkin