The meaning of filter in dream | Dream Interpretation
“Screening” one’s life for protection from undesirables
In a dream, a filter represents the essence of one’s faith and knowledge.
A filter in a dream also could mean music, taverns, dancing or insolence.
A filter in a dream also represents a man who speaks only the truth and who does not allow for impurities to seep into his life. (Also see Sieve)