Oc'cul-ta'tion, n.

n. [Lat. occultatio, from occultare, verb intensive of occulere: Fr. occultation, Sp. ocultación, It. occultazione. See supra.]

1. The act of rendering occult, or the state of being occult. “The re-appearance of such an author after those long periods of occultation.” Jeffrey.
2. (Astron.) The hiding of a heavenly body from sight by the intervention of some other of the heavenly bodies;—applied especially to eclipses of stars and planets by the moon, and also of satellites of planets by their primaries.

Circle of perpetual occultation (Astron.), a circle for any given place, at a distance from the opposite or invisible pole of the heavens equal to the latitude of the place, within which all the stars are perpetually below the horizon.