noun a sphere of action.
2. orb ·noun a blank window or panel.
3. orb ·vt to form into an orb or circle.
4. orb ·noun the eye, as luminous and spherical.
5. orb ·noun a revolving circular body; a wheel.
6. orb ·vi to become round like an orb.
7. orb ·noun ·same·as mound, a ball or globe. ·see lst mound.
8. orb ·noun a period of time marked off by the revolution of a heavenly body.
9. orb ·noun a body of soldiers drawn up in a circle, as for defense, ·esp. infantry to repel cavalry.
10. orb ·noun a spherical body; a globe; especially, one of the celestial spheres; a sun, planet, or star.
11. orb ·vt to encircle; to surround; to inclose.
12. orb ·noun a circle; ·esp., a circle, or nearly circular orbit, described by the revolution of a heavenly body; an orbit.
13. orb ·noun 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.