Then you can help such a ghost to pass over.

--- What does "pass over" mean here?
to pass over (to another (spirit) dimension)
It would be useful to get some more information about the context , because more possibilities could be considered.
To pass over could mean to die,comparable with "to pass by" or in a context as in following sentence.
"to pass over an item", also to leave out a point.
So more text would be great Emotion: smile
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Ultimately, a poltergeist is like any other spirit. In order to rid yourself of it, you just need to determine the root of its anger, maybe with the help of a clairvoyant. Then you can help it pass over.
 Ivanhr's reply was promoted to an answer.
Ivanhrto pass over (to another (spirit) dimension)

That's what I thought. Thanks.
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