What does "refiltered" mean?

Refiltered is a word that is not commonly used in English. However, based on the context of your question, I can infer what you might be asking.

Refiltered refers to the process of filtering something again, often through a different medium or with a different purpose. For example, if you have already filtered a dataset and removed certain elements, you might then refilter it again to further refine the results or to apply a different filter.

In this sense, refiltered is similar to the word "reprocessed," which also implies that something has been processed again after an initial processing step. However, while "reprocessed" can refer to any type of processing, "refiltered" specifically emphasizes the use of filtering as the second processing step.