Definition

To purify or defecate, as water or other liquid, by causing it to pass through a filter. Filtering paper, or Filter paper, a porous unsized paper, for filtering.

Other Definitions

This word also has another definition:

FILTER (noun)

Any porous substance, as cloth, paper, sand, or charcoal, through which water or other liquid may passed to cleanse it from the solid or impure matter...