Ann Yu,
Since there is no "book meaning" for this card, if you decide to use it in a spread I think the best way to interpret it is to first decide what it means to you. What does the card say to you personally? Then use that in the same context in connections to the other cards in the spread. It would be like any of the other cards. They have their own individual meanings, but in a reading you connect them to the other cards and in context of the quesiton asked.
JMO, but I hope it helps
