FILTERS

noun

1. A device which separates a suspended, dissolved, or particulate matter from a fluid, solution, or other substance; any device that separates one substance from another.
2. Electronics or software that separates unwanted signals (for example noise) from wanted signals or that attenuates selected frequencies.
3. Any item, mechanism, device or procedure that acts to separate or isolate.

verb

1. To sort, sift, or isolate.
2. To diffuse; to cause to be less concentrated or focused.
3. To pass through a filter or to act as though passing through a filter.