To understand what it means, you need more context. For example:
* Is it a person's name? If so, it might be a variant spelling of a name like "Calista" or "Calistus."
* Is it a place name? It could be a town, city, or region in a different language.
* Is it part of a phrase or sentence? The surrounding words could give you a clue about its meaning.
Please provide more information about the context of "Calisti" so I can help you translate it accurately.