1. (Science: astronomy) 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 to the eclipses of satellites of planets by their primaries.
Origin: L. Occultatio a hiding, fr. Occultare, v. Intens. Of occulere: cf.F. Occultation. See Occult.