What Does It Mean?

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From our dictionary:
oc•cul•ta•tion

(ok"ul•tA'shun),
n.
1. Astron.the passage of one celestial body in front of another, thus hiding the other from view: applied esp. to the moon's coming between an observer and a star or planet.
2. disappearance from view or notice.
3. the act of blocking or hiding from view.
4. the resulting hidden or concealed state.