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.

(transitive) To sort, sift, or isolate. / (transitive) To diffuse; to cause to be less concentrated or focused. / (intransitive) To pass through a filter or to act as though passing through a filter.

A surname from German.

plural of filter

Third-person singular simple present indicative form of filter

With a filter (e.g., a cigarette). / Having been filtered (e.g., coffee grounds).

simple past tense and past participle of filter

present participle of filter

The process of passing something through a filter. / Something that passes through a filter.

A person who, or device that, filters