orb

1. A spherical body; a globe; especially, one of the celestial spheres; a sun, planet, or star
2. One of the azure transparent spheres conceived by the ancients to be enclosed one within another, and to carry the heavenly bodies in their revolutions
3. A circle; especially, a circle, or nearly circular orbit, described by the revolution of a heavenly body; an orbit
4. A period of time marked off by the revolution of a heavenly body.
5. The eye, as luminous and spherical
6. A revolving circular body; a wheel
7. A sphere of action.
8. A globus cruciger; a ceremonial sphere used to represent royal power
9. A translucent sphere appearing in flash photography (Orb (optics))
10. A body of soldiers drawn up in a circle, as for defence, especially infantry to repel cavalry.

1. To form into an orb or circle.
2. To become round like an orb.
3. To encircle; to surround; to enclose.

noun

A blank window or panel.