a space or solid enclosed by a surface, all points of which are equidistant from the centre; a globe or ball
the apparent surface of the heavens forming the dome of the visible sky
any of the revolving spherical transparent shells in which, according to ancient astronomy, the celestial bodies are set
literary a planet or star
the area covered by somebody's knowledge or expertise, or the milieu in which they exist or have influence
the natural or proper place for somebody or something; esp social position or class
It is obvious that our social spheres have been widely different — Oscar Wilde
spheral adj
spheric /ʹsferik/ adj
sphericity /sfiʹrisiti/ noun
[Middle English spere globe, celestial sphere, via Old French from Latin sphaera, from Greek sphaira ball]