What is the meaning of Spherical?

Shaped like a sphere.

Of, or pertaining to, spheres.

Of a coordinate system, specifying the location of a point in a plane by using a radius and two angles.

Of or relating to the heavenly orbs, or to the sphere or spheres in which, according to ancient astronomy and astrology, they were set.

Of a multivariate probability distribution, to have a covariance matrix equal to the identity matrix up to a multiplicative factor.

spherical

Source: wiktionary.org