orb

Short definition from Wiktionary

Noun

1. 1
   A spherical body; a sphere, especially one of the celestial spheres; a sun, planet, or star
2. 2
   Celestial sphere; 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. 3
   A structural motif or finial in the shape of a sphere
4. 4
   An orbit of an heavenly body
5. 5
   The time period of an orbit
6. 6
   The eye, seen as a luminous and spherical entity
7. 7
   Any revolving circular body, such as a wheel
8. 8
   A sphere of action.
9. 9
   A globus cruciger; a ceremonial sphere used to represent royal or imperial power
10. 10
    A translucent sphere appearing in flash photography (Orb (optics))
11. 11
    A body of soldiers drawn up in a circle, as for defence, especially infantry to repel cavalry.
12. 12
    Amount of deviation from the closest perfect aspect.
13. 13
    A blank window or panel.
14. 14
    Initialism of object request broker.
15. 15
    Initialism of operations record book (used by RAF).

Verb

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