sphere
noun
\ ˈsfir
\
\
Definition of sphere
(Entry 1 of 3)
1a(1)
: the apparent surface of the heavens of which half forms the dome of the visible sky
(2)
: any of the concentric and eccentric revolving spherical transparent shells in which according to ancient astronomy stars, sun, planets, and moon are set
2a
: a globular body : ball
c(1)
: a solid that is bounded by a surface consisting of all points at a given distance from a point constituting its center — see Volume Formulas Table
(2)
: the bounding surface of a sphere
3
: natural, normal, or proper place
especially
: social order or rank
not in the same sphere as his moneyed friends
b
: an area or range over or within which someone or something acts, exists, or has influence or significance
the public sphere