• A blank window or panel. • A spherical body; a globe; especially, one of the celestial spheres; a sun, planet, or star. • One of the azure transparent spheres conceived by the ancients to be inclosed one within another, and to carry the heavenly bodies in their revolutions. • A circle; esp., a circle, or nearly circular orbit, described by the revolution of a heavenly body; an orbit. • A period of time marked off by the revolution of a heavenly body. • The eye, as luminous and spherical. • A revolving circular body; a wheel. • A sphere of action. • Same as Mound, a ball or globe. See lst Mound. • A body of soldiers drawn up in a circle, as for defense, esp. infantry to repel cavalry. • To form into an orb or circle. • To encircle; to surround; to inclose. • To become round like an orb.